Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ad1587f337cc6b…

MALICIOUS

PDF

72.6 KB Created: 2020-12-04 23:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46341023833993abe11132d6a215830b SHA-1: a4b4b3787e5ce5a1b5da57a9f9a9b69bb4e0acc8 SHA-256: f0ad1587f337cc6bf3be43543b5629113a3c60afec195300dc6435707adeba0e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=ar+rahman+surah+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5f8e6bb8d7ed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_5fbc2e3acdda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5fbca13d293e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408471/normal_5f9416f27c6d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5fbd8cfd3ac69.pdfIn PDF document text
    • https://dinoromakutaxe.weebly.com/uploads/1/3/4/4/134479472/12bd880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5faa08341dcab.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/guvovigo/sleeping_beauty_trilogy_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/hierophant_social_link_persona_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/79932715845.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/four_categories_of_application_software.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/jawiba.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/65226943912.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_off0000d0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EC 4764 bytes
SHA-256: dea626e26639ca18c75b8afc55a7b8a64dbbe5dec86ca910be14e8dca250e5b0
font_01_sfnt_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 11980 bytes
SHA-256: dce8b69dc199b1f2f3bb0c9bc91d1f502f4a07d082339d9ae5033c21ed62002f
font_02_sfnt_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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