Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ab92a5c0c5475c…

MALICIOUS

PDF

67.5 KB Created: 2020-11-14 21:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d00868ddf13009a8f7fd23c6004f1454 SHA-1: 20ee84d31152a7d84fc023a81f0fb46c4ad9af8a SHA-256: 25ab92a5c0c5475c9657615dc7e6e392433bcf2882f5d77aad36a61024f71b13
156 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 5

  • 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.
  • 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://trafftec.ru/strik?utm_term=british+council+ielts+academic+reading+pdf PDF link annotation
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/8adb28eecda.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/d0f7bdb7bd1.pdfIn PDF document text
    • https://nurirekesuvakip.weebly.com/uploads/1/3/4/4/134404885/6efda2f5c.pdfIn PDF document text
    • https://joguwezur.weebly.com/uploads/1/3/4/5/134500750/bunixasivakoro-fajorenatiweb-pozolar-gutimetokus.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/ca38f533.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/57ef5e78-6033-414f-a412-193497f3c768/5775380555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e082429-e09d-4219-8838-bc7064e8f480/francine_farkas_sears.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bangladesh_election_commission_job_circular_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/98172911128.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/sada_baby_bartier_bounty_mixtape.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/five_dysfunctions_of_a_team_discussion_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ea8fed-8681-45b8-8b74-078168f217b6/bovawu.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/84128443366.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/pssa_sac_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8C 5616 bytes
SHA-256: 4a6c362d3bc85ce4c88c8d0df479f0b09727fa220b0a8a25c5400bcfc58ad4ed
font_01_sfnt_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 10188 bytes
SHA-256: b6b841ab185afdddb3dc22baf7c751c0dcc44b885202b4cb4e101dd10dd064ea

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