Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edc4de9467bc21b…

MALICIOUS

PDF

69.0 KB Created: 2021-03-17 01:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ec89e93e6afc99fbc8e60f05cb25d5a1 SHA-1: f8327464a033c602b50bd0bc3fbba5914591ba1e SHA-256: 7edc4de9467bc21b60dd359562e0f8d1056c42f12f4f71ac6eddd00b7b5df61e
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, including one to 'jumiwimov.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a common PDF-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/123?utm_term=hey+there+delilah+audio+song PDF link annotation
    • http://wordwild-store.com/real_followers_apk_mod_2020kqzof.pdfIn PDF document text
    • http://fowatufilomit.iblogger.org/broadsheet_newspaper_melbourne.pdfIn PDF document text
    • https://jumaxejew.weebly.com/uploads/1/3/1/6/131606465/e6d976d0a629bb.pdfIn PDF document text
    • https://bebojeraje.weebly.com/uploads/1/3/5/3/135302211/zogenim.pdfIn PDF document text
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/sunipaxize.pdfIn PDF document text
    • http://xepusuxewo.iblogger.org/asme_bpvc_section_ix.pdfIn PDF document text
    • http://betmoy54.com/nutegelurukadapotaxugu3mi06.pdfIn PDF document text
    • http://2022god.com/829443573721gsf6.pdfIn PDF document text
    • http://trells.space/how_to_change_a_hot_water_heater_element_without_draining6rb0y.pdfIn PDF document text
    • https://bonagimeduvutup.weebly.com/uploads/1/3/1/4/131453121/3200172.pdfIn PDF document text
    • https://lonitavow.weebly.com/uploads/1/3/4/3/134355974/vifavafepuj.pdfIn PDF document text
    • http://tibetterrier.ru/how_to_find_entry_level_mechanical_engineering_jobsgdo4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vivijar.epizy.com/jibulozuzoxoroviki.pdfIn PDF document text
    • http://jotozig.rf.gd/zirutavagixajarubufesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b50130-8e09-42c8-b9d9-49784cff0d75/78875691175.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_c56ada5bdfed4d339a596521c102efa6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d36427f-4bfe-4059-92c9-72dc5f0b3a18/software_development_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266a4271-4563-4929-9eb3-21a0aab087aa/dovufaloduwuronolejoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cf2f4b-2ec1-4217-b717-b622e4080ebc/chinese_scooter_repairs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa74ecb-235d-427c-b6d3-2f2cb9d53e38/troy_bilt_208cc_tiller_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1941d9d-9368-48de-b093-866632c30a8d/3912980347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33368cf5-c2e1-46d4-8454-89406491d314/lifuvafadije.pdfIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_77f0381004c645b8880f24c87a2961b2.pdf?index=trueIn 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_off0000cf38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF38 5152 bytes
SHA-256: 7e9ef47df46c64b45d8ff752da6cc7b725327d28b7999efac81055c5b88b8009
font_01_sfnt_off0000e0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BA 11344 bytes
SHA-256: 436d03f388e5fc6f9169876c82d63eeb2968a19b4bc752997cb5ac267643e167

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