Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fba204f5ddfdf5…

MALICIOUS

PDF

77.4 KB Created: 2021-07-01 19:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71861363b4dbe85c39ce02207c05d031 SHA-1: 28ef94434737d34a2ea851dc055c5f3d38cd58eb SHA-256: 09fba204f5ddfdf56fcc21c496b380e48e81603847998f824c7237946bb160c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were directly extracted, the presence of numerous links on compromised sites indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71d861d4b4---17381596187.pdf
    • https://planet-for-events.de/userfiles/file/gomibodim.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d043c8edb68395fab86c02343c81aa6b/fubezazadoninupinemav.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b64c20c4cba74330b97400fbd04610c4/felavejofudexisaguwes.pdf
    • http://paroissedementon.fr/upload/files/nevimoselalejawozipupez.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/uop03kev8k1v6cfmq2r6ghpgq9/ritiv.pdf
    • http://freetourscadiz.com//ckfinder/userfiles/files/80750553622.pdf
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/80558910971.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/hcabbghm09a1frc2qddni3l1mn/4774913656.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/76pv2tede0bjls10npn5furtq5/53880483474.pdf
    • http://ubestsports.com/imager/files/20210604045128.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/41146cfc4b8f4aa51614fb4cf26e6f63/95538386888.pdf
    • http://botosani.ro/img/uploads/file/35316071662.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/56594839218.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a08213ace---xobogidagenapaginidigu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b452660665---43648640971.pdf
    • http://shinies.ru/img/lib/file/bukibatawo.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mnn4e76bpcmmmcq7c09rkim3c3/nenolijorutemisub.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b75c13848b---xoxiwaguxej.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/af7032068f852102043191c42bd7d775/vibod.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5bf23236c---desagerovov.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/efa3647ac2e8664c2566eef78e5fe2a7/wesena.pdf
    • http://railwaysrailroads.com/upload_files/files/15575869807.pdf
    • http://huile-de-nigelle.info/userfiles/file/koxod.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+time+is+20+30
    • 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_off0000cd7b.bin
b53deff3852b1e2d9db7af8fa62d84d7ee60a049e135d00a25e5a6018ca29590
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 16332 bytes
font_01_sfnt_off0000f735.bin
34eaa48dfef06ff7dbe25aade811f179c32ebbfec904f52f49e0e0c1dac66578
pdf-font-stream PDF embedded font (sfnt) at offset 0xF735 10408 bytes
font_02_sfnt_off00010ef2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF2 16792 bytes