Malicious PDF — malware analysis report

Static analysis result for SHA-256 986b7053acc8d144…

MALICIOUS

PDF

73.7 KB Created: 2021-05-20 15:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 105a47431e8d75283a721717eec0c3c1 SHA-1: 4338d01ebe4750bb6e970b47b0b27d996db28cc8 SHA-256: 986b7053acc8d144129c4a9f88e1d64b0420fe40e2b2801f45a9929f6e5afc39
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a significant number of external links, a common tactic in SEO spam or phishing campaigns to drive traffic to malicious domains. The document body, though heavily obfuscated, appears to contain keywords related to 'gaming chair' and 'wkhtmltopdf', suggesting a lure to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://zajinet.ru/strik?utm_term=how+to+fix+x+rocker+gaming+chair PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417138/normal_6039cb01715ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5ff0dcab45b01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5fe4c8583dce9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454813/normal_5fed7728d7e61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_6004936e792e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_606bfed8dcfa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_6063cd4c73c8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5ffdcff11d27d.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/vebomororefetejajizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fd25ffb14d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449410/normal_6059ed181a1fb.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/7c88415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5fd175cd5bcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477649/normal_5fe80f23781b5.pdfIn PDF document text
    • https://wexubowepupewaw.weebly.com/uploads/1/3/1/8/131856394/3984242.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/23476f2c-8940-415b-9bbb-f6be52d4706d/5820225000.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/xamowewupibepuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12f7730f-c43a-418c-9674-9b01befd7585/best_tai_chi_video_lessons.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/tunirasisugizipude.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/brucellosis_cdc_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3ca4fc-7892-4615-a9a7-d6cb5475ca7c/lewalin.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_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 5272 bytes
SHA-256: 92334360c9fe6749d30d00ed94d2836580e6841c5f4afb7c34230de181c9c270
font_01_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 10816 bytes
SHA-256: db5655f97e16c5b53f7ef3f6bbd6e36b68b456bd581b880db0d29bfaceac20d1

Open this report in the interactive analyzer, or submit your own file for analysis.