Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eaf7ae7f25a546…

MALICIOUS

PDF

70.8 KB Created: 2021-06-09 15:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cb4817b2c8aa0b16728ec9748f47bf3d SHA-1: b59733bbc47992460e52778f5caaef35bb8cdc91 SHA-256: 34eaf7ae7f25a54637bf7cddde503952d644a1705096b92eff3797d66955a1b9
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 0.9998

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://crophysi.ru/123?utm_term=dhakad+chora+ke+gane++mp4 PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4458389/normal_60b1b3065b126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_60683f640d723.pdfIn PDF document text
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/gibuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_605e1ddc237ae.pdfIn PDF document text
    • https://bidovakufizal.weebly.com/uploads/1/3/4/5/134586087/3978043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_603f71925f7b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451574/normal_6002d09292aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_6015e827144a5.pdfIn PDF document text
    • https://vefubonipit.weebly.com/uploads/1/3/4/7/134719522/61c641f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415745/normal_5fcd9f2a192eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_60553754a1c75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474759/normal_5fcf117c7ba64.pdfIn PDF document text
    • https://vijativu.weebly.com/uploads/1/3/4/5/134597759/ce0aa.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
    • http://xegosigex.pbworks.com/f/android_oyun_club_subway_surf_para_hilesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506bcbcd-d711-4a00-b466-dd513a30e437/maytag_bravos_xl_washer_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b27b6c-6373-40d2-be97-a02666e464f8/7988062600.pdfIn PDF document text
    • http://jutopar.pbworks.com/w/file/fetch/144719031/9.snf_fizik_kuvvet_ve_hareket_kazanm_testleri.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB18 5088 bytes
SHA-256: 6eec291ef3e6faed3ed91808bdf5c2414851b49c414572983dc4c09540efeb6c
font_01_sfnt_off0000dc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 10580 bytes
SHA-256: 35a257db560e4ffa4ca3b4f0dc9fa7f2c9dc9c7831c0019c94adb39fdbbcf82d
font_02_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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