Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaa022e6f6db6fd…

MALICIOUS

PDF

70.7 KB Created: 2021-08-17 23:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0681e55f20430697a4fe274950205e39 SHA-1: 947c3b6e725998fa3536ff7460d0cef5a688e272 SHA-256: bbaa022e6f6db6fdc770d6e074155ffecfd25c5c4e2f2d4cbc62c0660ae1de36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external resources, some of which are hosted on compromised or disposable domains. This pattern is commonly used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8313

Heuristics 5

  • 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
  • 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://penzion-u-zamku.cz/files/file/42885560989.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/4m55khsq7v27ggtahl0n7tu1pv/79398069411.pdf
    • http://abwingstop.com/uploads/files/bejedez.pdf
    • http://crmrealty360degree.in/userfiles/file/44426615050.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b31e3cea25b---rukenadafifes.pdf
    • http://mtecommerce.it/public/news/file/menel.pdf
    • http://burmeseburmilla-allevamento.com/userfiles/files/tezosojepijuwivexi.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/43a35be43016b0c619a41ec775bf8594/mifeju.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bjvlbqe1t4cot1r0e6v0e973og/80731534165.pdf
    • http://hidramaco.com/files/files/derulezokoxafel.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a695ad78db45d1b4141de9244dedab07/poranikuzekafesezuguvajuk.pdf
    • http://jpind.pl/userfiles/file/sivaxafexune.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbd275d546---xisesutexugixifo.pdf
    • http://35ct1.com/images/ckImageFiles/files/todubunaripokuno.pdf
    • http://yuhongzg.com/d/files/zegibusemugesavo.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16078a66631f6b---95564393247.pdf
    • https://egyiksem.hu/uploads/file/tisevejeruvuwimekagabidu.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/666a82463466eff741265892ac04d23a/revitatusutarewiwa.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/v69hifmtt4bvu59tont8n829cu/59176725727.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/54bf26a41e23138bdb20636d347dfb2f/rufaj.pdf
    • http://mobilenmr.com/files/files/3837272384.pdf
    • http://bouwbedrijfansing.nl/userfiles/file/golunageze.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/efd783f7fc278ce3171e9a02e29523b3/sazaxidik.pdf
    • http://fusen-es.info/yamituki-n/uploads/files/vomimi.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1610d409b943f8---ketejaremanawokam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=recliner+mechanism+lazy+boy+electric+recliner+parts+diagram
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 16792 bytes
font_01_sfnt_off000105ee.bin
e93ad6c6b5a77a302947cb01d04e5155187d3154e29302f82fb9efbf49b1345d
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 11320 bytes