Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a8e8438b9f859d…

MALICIOUS

PDF

74.3 KB Created: 2021-02-24 01:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f900086eaa999eafc2dc316455a4cedd SHA-1: eab0b1aae90e25f8de48e01729612cb10d82f885 SHA-256: 33a8e8438b9f859d33fc8fa0378ae7275ff921507ca7c22bf71fa3c489bba3d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a large link farm. The presence of urgency language suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=samsung+rf267abrs+ice+maker PDF link annotation
    • http://lnstagram-verifedbadge.com/zefujuvupubojqd4kj.pdfIn PDF document text
    • https://jironomazubem.weebly.com/uploads/1/3/5/3/135393756/buzolewofiruzama.pdfIn PDF document text
    • https://polidixixav.weebly.com/uploads/1/3/4/4/134467230/2091541.pdfIn PDF document text
    • https://gaxiliwila.weebly.com/uploads/1/3/1/3/131383945/gekinipulel.pdfIn PDF document text
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/kalojimapuda-wajofuxupifuse-godavag-wadododo.pdfIn PDF document text
    • https://popaxeras.weebly.com/uploads/1/3/0/8/130814769/6437882.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/67f9df4f57.pdfIn PDF document text
    • http://bobositufunoto.iblogger.org/5308988561.pdfIn PDF document text
    • https://ziropiwos.weebly.com/uploads/1/3/4/3/134311351/jesuzuxefitiketukefu.pdfIn PDF document text
    • http://wide-take.top/how_to_replace_door_latch_on_maytag_dryersuf15.pdfIn PDF document text
    • http://tradebot.space/lowilarosefirap9leh.pdfIn PDF document text
    • http://juvugewit.iblogger.org/fusuxizawunemebanimigeb.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/rijovuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kubafezin/bhaskar_oru_rascal_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/82854116718.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/juzadulepewisudejafisu.pdfIn PDF document text
    • http://xuvaduw.epizy.com/email_signature_html_template_code.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/wodewi.pdfIn PDF document text
    • http://woxanegerofokox.rf.gd/30979997038.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/kamyab_jawan_program_form.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 5844 bytes
SHA-256: 436084f4372d9777151883c7fc370c5ac057e873031e7d7fa4113c5f1a9cd665
font_01_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 10436 bytes
SHA-256: e1bf3ff0b6b0e6e2044d00647e88a61938fa3c4b74432a1a683377653236fa13

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