Malicious PDF — malware analysis report

Static analysis result for SHA-256 897f1c9ff8959321…

MALICIOUS

PDF

84.7 KB Created: 2021-03-12 04:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e9337378e4a995163cb71bfa82c5bf61 SHA-1: 97a38e396ac44a000f3a04986de0396ebfc74f8b SHA-256: 897f1c9ff895932115917cf142eebd38c34c9a94927e67ce398e9e84e6c773eb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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.
  • 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://leonvi.ru/wix?keyword=leopard+gecko+life+cycle PDF link annotation
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/e1b17ce3a.pdfIn PDF document text
    • https://bawimadesudife.weebly.com/uploads/1/3/4/3/134363746/kixijusuxawa.pdfIn PDF document text
    • https://gojesewemuvi.weebly.com/uploads/1/3/2/6/132681304/5376729.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/bUhgGjh/xufuxufigeregikogavosudom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_6033c97fc3cdc.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/a62125fd4.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/0f7c4856fa6fab.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/iciiiVw/rezoxumazi.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/4391135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd7cbe2dbef0.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/4026984.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/lojutagobubet-fasegexeto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_600212dab8b39.pdfIn PDF document text
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/9c55d9d038cf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5ffc3a032033f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_5ff9b50de7932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_b7373a3141394ed0aec214a3db1598e7.pdf?index=trueIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_561b6834a751414c8ecfcb15977a5057.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_1e035441a2f44dd5bce5b3ca4905f5e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/anne_marie_do_it_right_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/vudilonojip.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/gowodetoxaraxudiworox.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/rang_barse_dj_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/various_forms_of_energy.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_67f980cc1c3141b295e01f5979c79e66.pdf?index=trueIn 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_off00011010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11010 5252 bytes
SHA-256: 9f21498b12b82d3617eb3d12afd5feec6c847b4a363d096ed58240297b2fd544
font_01_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 10272 bytes
SHA-256: 6dc44518e1cc7b1c22a82b158c91deab0d8eedc25a333d635cd4212d238772fc