Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eaf91ea3ab01949…

MALICIOUS

PDF

96.4 KB Created: 2021-02-16 06:16:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 07a767074c1e0545c5c0dd5612a15de3 SHA-1: ecad4d6b0d6d5d9d90473d5d8e8119976b442d10 SHA-256: 9eaf91ea3ab019498de61a513c0a1b93cde2c3b3250c04eec7083253c4b0f5ed
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=cesar+chavez+movie+questions+and+answers+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489045/normal_60136f16456ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5fe8069c4d0a8.pdfIn PDF document text
    • http://roflan.site/11522918277dkzrk.pdfIn PDF document text
    • http://oneplusonemain.xyz/canada_food_guide_recommended_protein_intake9trwc.pdfIn PDF document text
    • http://eagleaff.com/28868170320fija8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_60001b804fcb3.pdfIn PDF document text
    • http://boretibixakofer.iblogger.org/recreational_activities_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fc90e77a9ce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff6a632138c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446152/normal_6000357a87a2b.pdfIn PDF document text
    • http://pitushok.space/infusion_enchanting_research0ccl5.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
    • https://s3.amazonaws.com/xoguwavosuje/caterpillar_generator_design_guide.pdfIn PDF document text
    • http://zonisitis.rf.gd/puporidobawotefekaju.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/satezimewaluvugewasijobu.pdfIn PDF document text
    • http://jominata.rf.gd/dungeon_defenders_2_weapons_guide.pdfIn PDF document text
    • http://jajapelemazibog.rf.gd/zamiteriwizinetazevoji.pdfIn PDF document text
    • http://kosoluzenoderu.epizy.com/mpsc_group_c_2018_pre_answer_key.pdfIn PDF document text
    • http://wavubodalut.epizy.com/munudigidezuvawovisemawa.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/add_watermark_to_adobe_reader_mac.pdfIn PDF document text
    • http://jopavufugas.epizy.com/anthropology_syllabus.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_off00012f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0C 5512 bytes
SHA-256: 7fee29399b3f8e0ca8a9dd4e41cfaec8a61385a464b378f3e7b7ec44fece36f5
font_01_sfnt_off000141bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BB 10364 bytes
SHA-256: bdfe8109a1c9dc06da793ffce3a2ac7e49b391f4794ae22fa6f3d45c75c19061
font_02_sfnt_off00016526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16526 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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