Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7947108cd6d5d1…

MALICIOUS

PDF

81.2 KB Created: 2021-04-08 07:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 98e9b35d6aef2d4393b8f35be30b2738 SHA-1: 50f6d497754b4891ce088519b2c476475df4da7c SHA-256: 3c7947108cd6d5d14c98f40e6e654734afca23090edbd2622cca38adbecc5446
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 0.9997

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://seumenha.ru/strik?utm_term=shark+navigator+lift+away+deluxe+hepa+filter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496571/normal_605f29cbdc895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fc9ab24916bc.pdfIn PDF document text
    • http://talejeripubala.iblogger.org/vuxapaditeguxibe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_602f503a037bb.pdfIn PDF document text
    • http://fosufupivufup.66ghz.com/freddie_mac_home_possible_underwriting_guidelines.pdfIn PDF document text
    • http://mofonuf.medianewsonline.com/beware_of_dog.pdfIn PDF document text
    • http://wabuxon.iblogger.org/may_glory_to_hong_kong_piano_sheet.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://kabewusibun.epizy.com/48997283385.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_f62ca725832f44d193e6ba230f498779.pdf?index=trueIn PDF document text
    • http://virixufagew.rf.gd/napinidexotokoromikakita.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_91fe3697d2884906811711353f587540.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_354b0acb82ca4177ac72b3af5d88f5d9.pdf?index=trueIn PDF document text
    • http://gudugapapilile.atwebpages.com/methodist_church_ghana_almanac_2020.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_410672794846440bb0ff0a50d860fae6.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_37ce3cd58671406aa32d89d422cb8094.pdf?index=trueIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_9bdaac384ae04a399289d50e856fac08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebb2ab1-13ad-4fc5-817c-6d115eb24d6c/rikojomodogovujisozatiz.pdfIn PDF document text
    • http://tivexedasabuxi.myartsonline.com/accenture_digital_strategy.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_239c53aefb474821b64bcca2eb8a3d4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/581dcb19-0e9f-4aed-a539-7edd316c5160/craftsman_lt1000_riding_lawn_mower_deck_belt.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_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 5496 bytes
SHA-256: 7277b2dac0cad09c72b333f6b1d858f2008b7157c54ccc8901e7d028da2d7a54
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 11372 bytes
SHA-256: e1ab8d20892eab749471eee9e375be3cd988a61a3ac9bb4056121aabacf54a27
font_02_sfnt_off00012933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12933 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.