Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd2ee093e98c453…

MALICIOUS

PDF

74.3 KB Created: 2021-03-06 17:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3230547b1c09b25545d00f58fbc88cec SHA-1: 098df1e96e8c9e06d7581f70eff3846e17b890d7 SHA-256: 7fd2ee093e98c453b5bfa49a4718562a3ea8e4f038163fc3b02a9469f9281bd9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The document body is heavily obfuscated and appears to be junk data, further supporting the idea that the primary function is link distribution rather than content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jumiwimov.ru/wix?keyword=costway+ice+cream+maker+manual PDF link annotation
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/4fc54359.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/gdjdjhY/romigutegof.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/vopupusovewutalefudug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374002/normal_5ffeb4a502589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447252/normal_5ff80fa642399.pdfIn PDF document text
    • http://kuwawaf.mypressonline.com/97259177562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_602d6d54baa40.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/71711ccf346c7.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/91643984355.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/ygci3XS/star_wars_kotor_pl_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/jdcuiie/duck_hunting_2020_bird_shooting_games_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/fegokirar/ib7jbjf/89264214923.pdfIn PDF document text
    • https://vafoguvisijun.weebly.com/uploads/1/3/4/8/134887412/tatugotorezudazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_592ade6381d04380a2f9704d73a7bd84.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_02fc1687b583434d8c3a9d7557607668.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_2b733541499147dd936f332130c5ec4d.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_526beba983fa4b5ba51a73f0b467f982.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_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 5108 bytes
SHA-256: 2113df777d2700c3339ddee35c7a156f0c81f64c26e06e63c22688a66e3f471c
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10392 bytes
SHA-256: 96e655c192c1a39a3a3326e411d0a2186aada62edfe7a07ed5e07496d7ea2555

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