Malicious PDF — malware analysis report

Static analysis result for SHA-256 050f731f1034e389…

MALICIOUS

PDF

96.6 KB Created: 2021-07-04 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be51a6002e2a0d9bed90195a8f33a7ac SHA-1: 84530bd1caba684b0441ea96106a4cd466622a33 SHA-256: 050f731f1034e38934c4673202b45c479525a61217532f889732eee4ee6c1707
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing or malware. The presence of 'LOLBin token sequence' in the document text further supports the malicious nature by indicating attempts to disguise malicious commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16073371e12fbf---85049807807.pdf In PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/95263598020.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/viruxad.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/kekugonidemelesitivos.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/kpli24r7g0me3pi81m6k22vb60/94252534552.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160735fa56ef38---52931952623.pdfIn PDF document text
    • https://isosklo.cz./uploads/kixumezano.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/a2b73df3dfe4e70feb421c93aba80e3b/pubefivodimasetu.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/109256fadc5061473df70acea444ebd5/nuxuruxozigi.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c79c37f30ac---gelivagotevegipowo.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ri492pi8sprucmdeu7u5n530mn/lufawufiketaxorapasix.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/73ff5132d3fc551f594fa963a1dfc39a/14642141284.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/37538602055.pdfIn macro / runtime command snippet
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/doretinanubusufesipibid.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/46463767000.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/96088178783.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/xugabejus.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/3461d5588a0d05f894f8a30f04743b87/909087548.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ieotps27iusjh60jds1m8vais4/mekavipinigilexepanuxog.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/tokobodelosepekewopir.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/37887720350.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083efcea7ead---57493409856.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a000f1334de1364104f78c5776b822fa/86642690206.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077200b168d9---nowemotexebalonuj.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/wowosaboveduburoxod.pdfIn PDF document text
    • https://vizzzio.ru/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gritty+eyes+blurry+visionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001189d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B4 10396 bytes
SHA-256: b363f8b62f9fe710de3278905447014ee7170352e025caedb031f037f0eab271
font_02_sfnt_off0001486b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486B 17204 bytes
SHA-256: b41398e2f684cced5a1df1a5a930061cff00dc273e6d3297e4208626762d68e4

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