Malicious PDF — malware analysis report

Static analysis result for SHA-256 2008d32a70722e32…

MALICIOUS

PDF

72.6 KB Created: 2021-06-11 07:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: be43e42341558952f52abb2d18ee7e77 SHA-1: cd51bc7de607d7770277a9720ac2d56261d1ec42 SHA-256: 2008d32a70722e3271511c88174e27ff24e8f252baff4cf4a032b4df84166228
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The primary URL points to a lure for 'Zynga poker mod apk 2021', indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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 https://crewmak.ru/pbw?utm_term=zynga+poker+mod+apk+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426558/normal_60052c6ebb6af.pdfIn PDF document text
    • https://ganajefij.weebly.com/uploads/1/3/4/8/134884795/6292847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476274/normal_5fe93e3e0b686.pdfIn PDF document text
    • https://viwetefebelogup.weebly.com/uploads/1/3/1/8/131857445/mobopisurunufetokej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_600a4f3849fd8.pdfIn PDF document text
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/lusemamiruvu-xigepok-minugegofa-jiluvakefoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_6061b4517a1fa.pdfIn PDF document text
    • https://jetizezososexu.weebly.com/uploads/1/3/4/3/134352600/77c57d.pdfIn PDF document text
    • https://bugupogif.weebly.com/uploads/1/3/4/7/134766918/nabuw.pdfIn PDF document text
    • https://jejojoroliwe.weebly.com/uploads/1/3/4/3/134310913/980776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_601f140dde665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481821/normal_60076a1408d72.pdfIn PDF document text
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/kiduzadejokaf-dexagakotuwika-mitek.pdfIn PDF document text
    • https://lotatodekimin.weebly.com/uploads/1/3/4/7/134705716/5162926.pdfIn PDF document text
    • https://redefanugolikiz.weebly.com/uploads/1/3/5/9/135975275/kovaperutiso.pdfIn PDF document text
    • https://lodetisider.weebly.com/uploads/1/3/4/7/134732723/26083.pdfIn PDF document text
    • https://rawabibag.weebly.com/uploads/1/3/4/8/134870232/menodiruvuxipovize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2361003b-47bb-47c6-88bb-5dd43c5a145e/sharp_el_1801v_load_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e445f2f1-017c-484a-8f88-09e8d891715c/kisabuwiwazufupozufotom.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_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 5516 bytes
SHA-256: a2c767546c0e39c626677762772d65a5772d0f31571b070867c74e59ba060ccc
font_01_sfnt_off0000ec8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 11468 bytes
SHA-256: bf67e9427c233d7e3f94efacc84cf1fbe85da35bb25052fafb510f3b1a33f05b

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