Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7a2d76a0801499…

MALICIOUS

PDF

81.7 KB Created: 2021-05-17 06:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8ee03f3d94d9d66ba6878c650991387 SHA-1: c72d16a30ceab15bfecbb88803b88e559f229d4e SHA-256: fe7a2d76a080149908523f41d74037e2d7cfb4b3643d402965e48b1889d29c1b
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://leonvi.ru/strik?utm_term=gauntlet+dark+legacy+runestone+locations PDF link annotation
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/9713684d.pdfIn PDF document text
    • http://zipipenele.22web.org/kadikorurobadonetorarixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_6028ba3181aa0.pdfIn PDF document text
    • https://jifefovemerozix.weebly.com/uploads/1/3/4/4/134444698/4229333.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/60722500625.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jZhhftI/zumobobujuvete.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/jafikonuvoseda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417406/normal_5fff5a5780ae4.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/livro_o_que__capitalismo_coleo_primeiros_passos.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/bgdjfha/48556968253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_60563e32e0ab0.pdfIn PDF document text
    • https://radelemetiwiwi.weebly.com/uploads/1/3/4/5/134520029/8055439.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/303d1c7e-811d-48e8-9640-de273bc004fe/vocabulary_workshop_level_b_unit_10-12_word_study_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed1f872c-5c7e-40dd-a5ab-a068ff10712f/naloti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ab18af-9b6a-4efb-b683-670a7d1b1072/82615075609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d07575-3528-4d10-b08f-22324efab61d/52698286903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66a8d29-b0ce-4d8c-8826-71a28d003f1f/wiggins_g.__mctighe_j._2005._understanding_by_design.pdfIn PDF document text
    • http://tuzipani.rf.gd/simoriwakumumut.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_off00010472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 5304 bytes
SHA-256: ce6ca177f07d911e084298b5fff407e568ba39de5c27831f3ca5a95006aa75e8
font_01_sfnt_off0001169b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169B 10208 bytes
SHA-256: b449eff87a8c908fbfa2b3a60e7aae4327d8d374dcb7546ef65a4df5b3a35286

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