Malicious PDF — malware analysis report

Static analysis result for SHA-256 302d8f474590067e…

MALICIOUS

PDF

81.2 KB Created: 2020-11-19 00:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b77924cd00ac593564bf4f8aacbb5f52 SHA-1: ec25b173188d0b852d21ea0e79fa304f70f7b3e2 SHA-256: 302d8f474590067ed25fa24abb3c9dcff74725d6da43b3d99d6f6449badeeba4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious activity designed to redirect users to potentially harmful sites.

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://traffset.ru/123?utm_term=obesity+solution+essay PDF link annotation
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/sebitivas.pdfIn PDF document text
    • https://romovemesokawaj.weebly.com/uploads/1/3/4/4/134479736/924ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5f976f1ea4a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f968fd4d16ca.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/guduzeweronajeg-viwinugomiv-jiboreputu.pdfIn PDF document text
    • https://tupipukevoluda.weebly.com/uploads/1/3/4/0/134041298/643927bbee6.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/lorejupebemujis.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/mikitinuzukituwori.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/ecd1fb41-821a-4c53-a3e0-40c3710b5e38/13902780228.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/bikini_bottom_genetics_quiz_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b795a730-63d6-417a-a3f5-b953d43aa019/38139744607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7d5469-5925-46f7-8171-88d621bf9baa/kobofetiripe.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/factorising_quadratic_equations_worksheet_gcse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db8a020-31bb-477c-ba07-09002eb56450/op_amps_and_linear_integrated_circuits_by_ramakant_a_gayakwad_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a803973-cbbf-481e-ba89-cb71159f73d6/tabudegagatotizezir.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_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 4852 bytes
SHA-256: 71667cdc97e176253f5daa78c1746be9e9d7783bad42b32fb5cdf4467e627748
font_01_sfnt_off000109d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D8 2052 bytes
SHA-256: 45161600c168cb86abea0d582939cff7e26865ccef696145a84b56b2745b4fe2
font_02_sfnt_off0001128d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128D 10916 bytes
SHA-256: c5baf4279e334c39ee1029904eb62be9db3e9fda50ac7c6628427d3b317ce9b5

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