Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a6a3ec04a0a40e…

MALICIOUS

PDF

84.5 KB Created: 2021-04-12 00:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 02bdb4b833946281b63ff7a46ce5684b SHA-1: e0b0407141e4feb5baf29147302d07381192a16f SHA-256: 29a6a3ec04a0a40e9e0c05eea9d1b73bcc119e3e1f8a3d72ab037497e9ea04ce
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a lure to a malicious website. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://jottigo.ru/strik?utm_term=is+apple+juice+healthier+than+orange+juice PDF link annotation
    • http://zituwuwobilel.22web.org/absolute_value_function_transformations.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/740060.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/foolish_heart_steve_perry.pdfIn PDF document text
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/8192806.pdfIn PDF document text
    • https://begobaxu.weebly.com/uploads/1/3/5/3/135336669/7872091.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/98e1daf.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/solex_carburetor_working.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/fitesigejolab.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/7616754880.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/vitikuwokevuligor.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://uploads.strikinglycdn.com/files/4b986a6c-bf1f-440a-8156-e3940881b555/294015966.pdfIn PDF document text
    • http://rozazidugo.epizy.com/yannick_afroman_sou_bakongo.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/iphs_guidelines_for_50_bedded_hospital.pdfIn PDF document text
    • http://biwosekawabaxi.rf.gd/barewarazisobemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b23ed6-4f4d-4f12-b421-f6ec22653bd3/dress_for_first_day_of_school.pdfIn PDF document text
    • http://gulagopafed.onlinewebshop.net/75785655424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a27668-e3ff-47c8-b5c5-a23bb529a4d6/fegawugerudowadawurobuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7d1d67-fcf0-461f-bbb6-1d68ea3d1e67/22454039339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7cb5a3-2900-4f2b-8945-4e6b11d5dd72/pak_study_mcqs_10th_class.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/zejibapenufegutoluwi.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/24694665137.pdfIn PDF document text
    • http://bidajalej.onlinewebshop.net/18406577766.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_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 5092 bytes
SHA-256: 8f89d0f6a2ac135462aa96adbdce38e16b135312e43b4b650065e960ca9cfd51
font_01_sfnt_off00010eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECA 11584 bytes
SHA-256: 0f555847f9a9fff693c8ed855db57d8bafb1bc98c5115c5fb05968285dbc1f2f
font_02_sfnt_off00013649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13649 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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