Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e8cd657364f276…

MALICIOUS

PDF

75.3 KB Created: 2021-05-15 10:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f7cbf97816231ecdf476ea6966c90001 SHA-1: ebeced04a836913536f4b1e9cc15d0463b34ca48 SHA-256: 61e8cd657364f2763876614ba2afff13dac9994cebe9a1612fad7eba603a2be3
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://pelibifir.ru/strik?utm_term=que+son+las+purinas+en+nutricion PDF link annotation
    • http://fomuvegikutidob.iblogger.org/oriya_bhagavad_gita.pdfIn PDF document text
    • http://zebarugusi.22web.org/52215364951.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/lozijafogu.pdfIn PDF document text
    • http://setofexperience.site/naturalizer_sneakers_morrison6t80i.pdfIn PDF document text
    • http://faxizila.iblogger.org/5434572009.pdfIn PDF document text
    • https://cdn.sqhk.co/wogesowive/jMaP4hh/project_blue_book_tv_guide.pdfIn PDF document text
    • https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/pisisegelati.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/fb4ae342899.pdfIn PDF document text
    • http://pukazabix.22web.org/nazozixov.pdfIn PDF document text
    • https://wetugaremuzen.weebly.com/uploads/1/3/5/2/135298520/397713db8a1.pdfIn PDF document text
    • http://health-top.ru/continents_and_oceans_map_quiz_printable6zuxd.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/8386974.pdfIn PDF document text
    • http://zozegakipuvi.iblogger.org/forearc_basin.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jgMgkjj/42241967513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a9bb55-7e06-4014-8a89-6b257b3f12c4/8188085453.pdfIn PDF document text
    • http://famirasavu.epizy.com/jusis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d667766f-8139-4fe0-8e94-cd77942362fc/world_history_patterns_of_interaction_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e6ff1a-6e0b-4db4-b9f1-7e67e4b15ae8/is_an_mba_worth_it_reddit_2019.pdfIn PDF document text
    • http://zujuxeropide.rf.gd/online_merge_software.pdfIn PDF document text
    • http://nejevedi.epizy.com/kaloke.pdfIn PDF document text
    • http://xowomowipuzu.epizy.com/troy_bilt_pony_rear_tine_tiller_manual.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_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 4988 bytes
SHA-256: 50a89fdda1c660e4c56d93f07bcf28321316164bc96066eee01c8133723850ce
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 12120 bytes
SHA-256: 58a525df378fd31f440c55d9d1946bc49d220a869d868ac9410ab544b8258e3a

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