Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7d9e64a3cd8e2e…

MALICIOUS

PDF

92.9 KB Created: 2021-03-10 02:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8413a54eb558fa8a925f6157c34583a8 SHA-1: 212f08ef2859a7ddfa7c5445350c03a612dca01b SHA-256: fa7d9e64a3cd8e2e92d2dd78527d3a9fba53d2af64f12c6522206b28ccd0c6cc
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://pelibifir.ru/123?utm_term=core+java+practice+questions+with+answers PDF link annotation
    • https://cdn.sqhk.co/xarozowuzosa/MRjiifz/kidifekodomifawi.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/kYhSYje/86375569713.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/ihahjje/dizaxokifamufigodib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/jisufoxom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e25e4c2-7ff7-484d-be66-aa0af86b1844/35482100211.pdfIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_f01bbd25dc684dbfae265df20d7dffca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3d4f73-5986-4899-aea6-4d54e0169358/43839881195.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/cholangiocarcinoma_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64acb12f-35da-4c26-9eff-3a2cca162c73/get_forklift_certified_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/charlie_brown_coldplay_piano_sheet_music.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_a6e8ea8ddeb546739f23d1b7a665bc9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/408d4697-6981-44f5-9167-720a94458053/how_much_is_max_lucado_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae18946d-08c5-4761-bf35-85d506ca184e/how_to_tell_if_a_cop_car_is_undercover.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/dna_extraction_from_strawberries_lab_answers.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_4b478e81095b4881bb2fe169b89a21fd.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_3b19e8b3bf6545109097c4bea95458fc.pdf?index=trueIn PDF document text
    • https://ac734925-007a-49fa-9a6b-2340142042ec.filesusr.com/ugd/ea78e0_3121001654f1438189014f648724d83d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/how_should_you_stretch_before_lifting_weights.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/miolo_agenda_2019_gratis_corel.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303F 5248 bytes
SHA-256: 89e6c777a4be334a23b1bb1882c61ffa3890e6422cb9b8f1371d70fab2473828
font_01_sfnt_off00014229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14229 10536 bytes
SHA-256: c4dad32a61783d5a11d312bbfc3bc7a64d366e555b79603a2f86b04d51910dc3

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