Malicious PDF — malware analysis report

Static analysis result for SHA-256 0502cded3daae711…

MALICIOUS

PDF

104.1 KB Created: 2021-09-13 19:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e395855817212b0b791e9e768c30996c SHA-1: 65bf097bb0b1c10ad3b4ca3f4205a2d85605e35d SHA-256: 0502cded3daae7116f8d08fb33d46115de3efed81729b3bc66b880b69016c0b7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised websites or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://centreforeffectivecoaching.com/media/file/35072200514.pdf
    • http://aligokdemir.com/resimler/files/74168035976.pdf
    • http://djapm.com/userfiles/file/wetenobimiparaxap.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/82000186641.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebaa9033d0---mubiferudipaxifovedol.pdf
    • http://www.binghan.my/userfiles/file/midewujukadagizilopi.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b02775b1f580bccf14f81721d7b89068/tapabavozafu.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/magasivep.pdf
    • http://kowel.com/ckfinder/userfiles/files/1630730766.pdf
    • http://elsped.hu/files/file/warosijasinateses.pdf
    • http://euroear.eu/ckfinder/userfiles/files/tewuxomufitomemolex.pdf
    • https://adikkeempat.com/contents/files/xufupuduxaporuf.pdf
    • http://paolacaone.eu/userfiles/files/19907658835.pdf
    • http://naturpix.ch/cmsimages/file/21811777559.pdf
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/gusigo.pdf
    • http://purepoem.com/resource/docContentImg/file/2021-09-09/9eaa91925bd81513b963abcc7ead99a1.pdf
    • http://markone-tools.com/upload/files/benizesolupuwadituwarotip.pdf
    • http://myblindz.com/fck_user_files/file/vobudodawik.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9295bd8450251bcd4a5b368b8ec21675/vatiwefexixikex.pdf
    • http://salt17.com/userfiles/files/46314471773.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f64ff2a093e4ca0041fe19112698341/8659989163.pdf
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wegitikifogon.pdf
    • http://chromavials.com/d/files/69614790037.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ocarina+of+time+online+randomizer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013435.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13435 16792 bytes
font_01_sfnt_off00014c47.bin
f5267f996bdfb8b68c43a405509fdb6ecd77533234202b3aa23e1fe222c89481
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C47 18332 bytes
font_02_sfnt_off00017b50.bin
9bd7523fc5be1f9eb1f7f07b6b8165791d7abfa927e9f6feafebc452af2a9b80
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B50 10556 bytes