Malicious PDF — malware analysis report

Static analysis result for SHA-256 4254a7510516d5d1…

MALICIOUS

PDF

62.0 KB Created: 2020-11-14 07:20:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 59a20c11254400fd77064b063c1c2d62 SHA-1: 0adf8b65fb659ea6df6dd00d0ae3e45239208f15 SHA-256: 4254a7510516d5d124cc3ae282f49a4615e6583ca819bab3a856967f2cde194d
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 0.9994

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://trafficel.ru/aws?utm_term=amazing+spider+man+game++mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5f8f674752d75.pdfIn PDF document text
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/xuzexexem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5fa50c3b9aed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f99185e8e04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f87517503cda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5fa5343b6f604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8eb3600e714.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://s3.amazonaws.com/zunaduxa/atp_rankings_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321d3521-a950-4513-88d6-5fd74aeeb3a8/61966941532.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/98444495806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e8e4ac-3bbc-48a8-b07b-402f3993e04e/12_snf_arapa_ders_kitab_cevaplar.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_off0000ab87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB87 5060 bytes
SHA-256: c90eab1e5cfaa94159fb8f788424a3c48aa3d4e1191a65ed6858f970b72a43f9
font_01_sfnt_off0000bc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC96 9668 bytes
SHA-256: fb6cc2ab0c5c04976a90d1b636da89fc0156647e969547c6bae8b4158d9a8e4a
font_02_sfnt_off0000dd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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