Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ad2b98a13c049d…

MALICIOUS

PDF

95.7 KB Created: 2020-12-04 03:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a785757279088f0e48c76619b5dd9807 SHA-1: b6ee1e3fd2c29f402819ff53c575850bca06a1bc SHA-256: c7ad2b98a13c049d95eb25461406374bfda093a7afaa32f9741c22de30e279e5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

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://trafffe.ru/aws?utm_term=greatest+guided+by+voices+songs PDF link annotation
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/3775741.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/kipaje-jowipiziwokus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5fbbe70a2ba1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e95cab66-35fc-4202-ba07-a44cc21180c1/lerixumuxujimovowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d150257-a2d2-4309-a046-ced32fa66e07/the_book_thief_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa12736-a225-4dc3-b335-a2971e6fc94c/80220976314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1e52c0-3f1e-4c8a-afaf-55122111a123/15852504323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2736a8-6476-44f6-8280-ce08df193df3/54182012471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4415dd-8fb1-4c7a-b447-74400030f8b5/wodovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5dbd49-7e54-4af0-b343-922b8903e459/a_esmorga_eduardo_blanco_amor_resume.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78acea4492a057e240f0a/t/5fc9784056e7c50656c2bc85/1607039040233/baby_gap_girl_toddler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b32546a-fd67-4ce8-abbe-59d9bbe07a86/58572411348.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD3 5292 bytes
SHA-256: 7c3a27da3610087ed09cd6ff4078901dcdd992fe0d8659348d470623e9d93450
font_01_sfnt_off00013de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE6 11160 bytes
SHA-256: d199a9864c058e3a09cec3919f1b8691d58f7d3603dc5324777d06397ddd3756
font_02_sfnt_off000163af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163AF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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