Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2217d57c61e281…

MALICIOUS

PDF

60.9 KB Created: 2020-11-14 07:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d861c7d2e62708091f3c358d19d449b5 SHA-1: 31ec772c3e3d0b6b06a432f7ec1bf464a385ba79 SHA-256: da2217d57c61e281d437240ba61162e37aa3d9bc20926c1c10a8e13abf11088a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a heuristic firing for a link farm, indicating a large number of external links. One of these links, 'https://trafffi.ru/aws?utm_term=bangla+typing+tutor+free', is presented in the document body and is likely used to redirect users to malicious content or phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

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://trafffi.ru/aws?utm_term=bangla+typing+tutor+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409254/normal_5fa50f15c3c27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f89359feaa60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5f929dfa0456e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f888d74cbb42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f915ab8b6bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f8a165626a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_5f9e3a0fd210c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8e4abded34e.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/vefena-joxegevow-saxosedopaxeta-farorewufama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5f96a22fcef4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f9c4c40d9b49.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/88a6682e-ae59-44fe-b283-c3e5bc954211/89135166123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc95402f-3123-4191-9e5e-88f502f87dcf/jozilux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d02801e-232c-4b2a-91db-b05fff9b479d/vunefosili.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB563 5040 bytes
SHA-256: 22bf0ef27ce4050e147ac4cc45082c3e90041abd7debf1c8bb24b8e870b5b902
font_01_sfnt_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 9340 bytes
SHA-256: 5cdf7fa6b7442b2d95926445405f7f345e21c2cb8b9f51f4e7efcea00a211af5

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