Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec03b8865f77e24…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 10:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f5342a1664966f80f316b2114e85e342 SHA-1: 1fddbcb872b786a7b8c90accf15c658aadbe84b9 SHA-256: bec03b8865f77e24ccb52a26c3a7befd6ebf27d3c5cf72edc2d2bd437169074c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a lure to execute commands via the clipboard, indicating an attempt to trick the user into running arbitrary code. The document also hosts numerous links to other PDFs, suggesting a link farm or redirection mechanism, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 https://songhong-thudo.com/img/files/sugoxo.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829ef41a590---lidiwenalimegusarorefen.pdfIn PDF document text
    • http://riph.pl/userfiles/file/japapobamubadawoxaj.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092895740355---82612934496.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/c8f16c01a14aea2e44d9d8ece827bcbe/wekavovuwatepixurudidad.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-19/20210519002645405820.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160babb8f4600c---51431382916.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088763cc81f8---35056292610.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/94842519254.pdfIn PDF document text
    • https://bbmint.com/userfiles/file/32156003266.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a565458c5986b6458748749ab7133f99/rexapafinulufirimiv.pdfIn PDF document text
    • http://rghsalumni.com/clients/82979/File/gikeredebiz.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/vasuligek.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/8cd7cf48f406a6f6cadac09df29132da/talumabezesuvazip.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609629175ed0b---51293025904.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c714a4c6bb0---81863563171.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/796337447c7203f18aefdf17e48b7d52/garatumadewelavafenosefak.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e68d6822a---difetel.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7e71ba6fc---tofitilaku.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/37919430600.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/96316782990.pdfIn PDF document text
    • https://www.dars.bg/ckfinder/userfiles/files/dawonowivagofofofapu.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/kaneselavexiwu.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ea9825f43---89322863233.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/vuvipipofasesa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=micropython+esp8266+documentation+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/024663910d6a3ed9b96f211b0dc1eb5c/65591765007.pdfIn PDF document text
    • 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_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 16896 bytes
SHA-256: cdcbf50f472c3d6cb8502e943fd6061bc29da2f8ddba0707265e6fde4d50a8f2
font_02_sfnt_off0001241b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 11544 bytes
SHA-256: 3ff8131b61f8f2585f264b64d97cb1adf5e90852007d5a3196700cca9c783b56

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