Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a56038f8d6be4c6…

MALICIOUS

PDF

100.2 KB Created: 2021-08-26 17:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 81858b58113a92079026aa060a01cb1a SHA-1: 29e4f771984c79a99a20513deabd71771c531bd6 SHA-256: 8a56038f8d6be4c6af52b8aaa70c5c997d306e1db50ba0c1bd50f28da559b504
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicate that the document is part of a link farm hosted on potentially compromised or disposable infrastructure, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://imahima.xyz/js/ckfinder/userfiles/files/8785884675.pdf In PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/kubewanakesepaviledejive.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a97c0420a15a1e00a172205836f1a060/15024350004.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879b0807d8b---20244305663.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/omu01gnc49eptrgjtts9j2ptla/perufenuripokox.pdfIn PDF document text
    • http://vina2002.com/uploads/files/sanabefewizujoze.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/89632891197.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/21368330023.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/wamaxikibe.pdfIn PDF document text
    • http://citra.cl/userfiles/file/tikotebu.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/mepepiriwazugaxodikuroli.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce65316ab---fojamubo.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/85c62ccebd142dafda821ee8e99bad32/40609723469.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/lunipotitanas.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/73970574030.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/d45016a4ff28fbd4dd99f702e13ede8d/biwitexefunuvulijupalukik.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/81659502345.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097980ce0cec---62128748487.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/9cf7193851a39a49e80e54d1b9a290e8/85292841110.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/zilul.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/10f8ed5fed84e404132f92dda1e94ac8/59757278481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=scholar+ring+ds3PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D10 10664 bytes
SHA-256: dce09799ed6f58e0538198af6a6beec20ca609ac78186a26f061925e0781a6ec
font_02_sfnt_off0001552a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1552A 17424 bytes
SHA-256: 6eb2e6503c0f16a6579e35d1f4bc2eab86f5130ec377190ac5388f37d891b032

Open this report in the interactive analyzer, or submit your own file for analysis.