Malicious PDF — malware analysis report

Static analysis result for SHA-256 0315754c4ac7c14e…

MALICIOUS

PDF

74.6 KB Created: 2021-03-18 19:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: df4f5bd6e6c0f0cd74cf17fb78e12e05 SHA-1: a60d888fea45ac25c24a2223fee7c6c694e55861 SHA-256: 0315754c4ac7c14e968cc50f5c07b51a7c20e90e54ff6315489ec7a7ca201615
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, appears to be a lure related to saving Tableau workbooks, which is likely a pretext to encourage users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=how+to+save+a+tableau+packaged+workbook PDF link annotation
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/buperotujabojal.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/52d719250f.pdfIn PDF document text
    • https://rinadulig.weebly.com/uploads/1/3/0/7/130739308/wikafefefon_roposokafoz.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/diwiwozivugipo.pdfIn PDF document text
    • http://pubaninuw.22web.org/antiphospholipid_syndrome_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_601185b29d6b9.pdfIn PDF document text
    • http://kazerurido.iblogger.org/the_hunger_games_2013_in_hindi_download_filmyzilla.pdfIn PDF document text
    • http://libotopatolar.iblogger.org/love_yourself_answer_e_unboxing.pdfIn PDF document text
    • https://kigusokitog.weebly.com/uploads/1/3/5/3/135300221/demev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_60380f63cb4cf.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
    • http://sofidubanelen.epizy.com/photo_video_locker_calculator_apk_free.pdfIn PDF document text
    • http://vumazudu.rf.gd/14979666078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d080d58-97ca-4601-b744-15d3e0a45117/86989890993.pdfIn PDF document text
    • http://zarusorujot.epizy.com/28713980776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a8423d-059a-4e07-b44a-afe012cd2c36/call_app_keeps_stopping.pdfIn PDF document text
    • http://jilutuve.rf.gd/70915448085.pdfIn PDF document text
    • http://pemetuf.epizy.com/93270948030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f04b7c-0810-4354-a411-f01bf52596c5/76994594622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9673016d-caa6-429d-8966-35f7fc328fe0/bakovimowakodisapimoroz.pdfIn PDF document text
    • http://tumitodutib.rf.gd/42465567554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c2613d-73ff-49f3-83bb-6f9afc923413/rufaguragumabufosusidaw.pdfIn PDF document text
    • http://moletilezozosi.epizy.com/rancilio_silvia_espresso_machine.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_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 5284 bytes
SHA-256: 61ee2993bf78f506ca3c22b3ab67ebce23a5433a3c7306dd417b5d6552bdafae
font_01_sfnt_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 10572 bytes
SHA-256: 9d6c1184420c913ce9c477a8c82faeaae977ea7e4d9b8ae4bbb3970db054337f
font_02_sfnt_off00010eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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