Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30e0d0aee3072e6…

MALICIOUS

PDF

84.4 KB Created: 2021-05-25 08:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0abefcb7c9728aa092b9f67a7b47a579 SHA-1: 73a18b17b6b94cc835457b24ec7d9003dc5df301 SHA-256: d30e0d0aee3072e6ac40f3ec7e95c63168b23715aab16babe15e5d52927bc4b2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The primary URL, 'https://seumenha.ru/strik?utm_term=100+successful+college+application+essays+third+edition+pdf', is presented as a lure for college application essays. While no scripts were explicitly extracted, the PDF structure and the high number of external links, combined with ClamAV and ML detections, strongly indicate a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=100+successful+college+application+essays+third+edition+pdf PDF link annotation
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/ad367.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/rufotazufofusid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404730/normal_5ffd4f8aa492a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_602124ddd357c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5ff3bafdc6b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_606919f8e5a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_6069f7a05d412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_606489dfdb045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_60066c8550344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490918/normal_601e92823bd99.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/a0e567f85.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/jeworurowam/handwriting_sheets_ks1.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/5497265771.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/cardiopulmonary_resuscitation_coding_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/vizio_e601i-a3_refresh_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc7018f2-5d52-4361-af7e-9f66d6b4184a/what_is_the_top_speed_of_a_49cc_moped.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/xuvijulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c206ee67-a120-4bb1-b6ba-b994e82b85ae/why_is_my_polaroid_bluetooth_speaker_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c311a9-b326-4b68-b2b4-11d0d927a387/toyota_sienna_2006_for_sale_in_abuja.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_off00010d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 5620 bytes
SHA-256: 2c637260d64515dee99829a5c1b2f8eadbaae3efe4adeb25a9d67129186be48f
font_01_sfnt_off00012065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12065 10424 bytes
SHA-256: 246b37a6933ae5c2ff735356695cb129e424fb98927f91f2eb6d56df20e1e235

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