Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce1a83bbbd3b4e5…

MALICIOUS

PDF

75.3 KB Created: 2021-04-13 22:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06f46bfe20fdba50d348da9da033353f SHA-1: 189a9a51dcf2547d3476c0c8fbbc32f53a629e4e SHA-256: 5ce1a83bbbd3b4e5083ba89f0474e590534e6102f609d764cfa4e9a46a3e1ad4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://crophysi.ru/strik?utm_term=the+presentation+of+self+in+everyday+life+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381291/normal_600dfa865f157.pdfIn PDF document text
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/4604152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_601a2334b5ca9.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/ghcgfhe/holiday_accommodation_near_chatsworth_house.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374520/normal_6007b36ac5aa2.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/kemivemamaxiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_60638dae9b7ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_600fc63cbb77c.pdfIn PDF document text
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/8721368.pdfIn PDF document text
    • https://nebowepef.weebly.com/uploads/1/3/4/4/134483035/mejafikifolexan.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/iGjhhfh/cat_has_runny_poop_for_a_week.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/a0heCjf/word_of_the_day_bible_verse_kjv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_84b29e8952954fca876b44678f8a0df8.pdf?index=trueIn PDF document text
    • http://bidanata.rf.gd/sd_cid_format.pdfIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_25d0c96ace174044aab97f97697989b3.pdf?index=trueIn PDF document text
    • http://tuxijug.rf.gd/rojakorodusa.pdfIn PDF document text
    • http://gevevutonixojub.epizy.com/is_cfa_worth_it_in_india.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/62474611783.pdfIn PDF document text
    • http://wogenulelo.rf.gd/137291119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1a35a1-a0bb-4f7a-9e84-725a8c0538a7/constitutional_law_1_matrix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83dbcb17-523e-4d13-821f-de74229b6a04/multiple_streams_framework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ff93d5-5edb-498d-ae01-f3949324de64/psalm_23_commentary_matthew_henry.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_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 5364 bytes
SHA-256: 3cae910b281d7e80dd4d886f9ccdd431eceef0478210bb929657cbdc0134b14e
font_01_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 10592 bytes
SHA-256: b052a05c5ab4124b7cb7d935998148ae8523c14b499e742b5bbbb9c6935b58d0

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