Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde58cb983355cf8…

MALICIOUS

PDF

76.3 KB Created: 2020-11-12 23:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a8d75d13d0403d6bc0c711dc3b837f99 SHA-1: 968c0f354749a03766fed5fff3507d3f9b1ebaf3 SHA-256: bde58cb983355cf864836b211acbdce49c2343799a1b140b80c857fc2bdd7e7b
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?utm_term=battle+of+whispering+wood PDF link annotation
    • https://vizomitula.weebly.com/uploads/1/3/4/2/134266598/d7eb7ef75.pdfIn PDF document text
    • https://ladasewesadil.weebly.com/uploads/1/3/4/6/134665294/wajotuf_bibebodanul_nilegoriwiwomo_vifinazare.pdfIn PDF document text
    • https://fovenuratosoka.weebly.com/uploads/1/3/4/5/134582487/969459.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/9473efc854e.pdfIn PDF document text
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/vasuvo_tuxab.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/8211b511.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/023cce6a-e053-4f68-a4e4-c5697b21b528/jolupoliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130283db-3376-4522-b873-90ce55301437/22144049156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8531b33c-80c1-40b5-8a4c-ca031a5810c8/gidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585cdcc6-05b0-458d-b1b2-be17514e993c/xewidejikonov.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/mcpe_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7598b6b-796d-4d80-bc12-ea2d55335ee8/51313332426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01557da7-36ee-48ab-956c-bd6ebddba2d6/nakepokoriguzadapomuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbda57ce-c327-4d92-ab62-7e8e7d43c537/jubegazupa.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_off0000de85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 5232 bytes
SHA-256: b49bd3bf5bd6ae0c4b9aeae73a21d8e32268b1f15bfcab85894aad301540b22c
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 11120 bytes
SHA-256: 849ee960121fc96477d6a04b2094f7b09f953fcbf4ad6f46d316cd4c988deabd
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.