Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21c370d073b1b59…

MALICIOUS

PDF

82.0 KB Created: 2021-04-18 18:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 80b75c6cada5b1ac54161c79dd52f2e3 SHA-1: 993f64171c411a509fe63998c88a950985661dd8 SHA-256: e21c370d073b1b5958682f124843a633c4ea951a6e140d47f13516a61fa14ea9
126 Risk Score

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://soxebez.ru/strik?utm_term=all+my+sons+act+2+themes PDF link annotation
    • http://reassurez-moi-fr.info/woladokutonasemiv0o5oe.pdfIn PDF document text
    • http://filanion.online/how_to_change_oil_in_a_push_mowertse76.pdfIn PDF document text
    • http://fezanabuxa.22web.org/wazifotepezitudikapu.pdfIn PDF document text
    • http://lololuvipukaji.iblogger.org/cardinal_vowel_system.pdfIn PDF document text
    • http://jebumivusesujan.iblogger.org/ansi_150_flange_dimensions_metric.pdfIn PDF document text
    • http://rezltml.xyz/jozewugcr3lt.pdfIn PDF document text
    • http://itslm.fun/45073360262irvju.pdfIn PDF document text
    • http://dvigatel.guru/schaums_outline_of_french_grammar_seventh_edition6nxfb.pdfIn PDF document text
    • http://uuuuull.space/kugubids919.pdfIn PDF document text
    • http://ryduslim.website/takonudazonuvozunimr35kc.pdfIn PDF document text
    • http://milanbeachs.space/cool_tumblr_drawings_easyril1y.pdfIn PDF document text
    • http://awpmode.com/density_virtual_lab_answer_key_phetsz6l9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_7d4cb87f200f4e8ba5a8ea2bb623db99.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_e3f331703e054bbc81c2daeb03afa471.pdf?index=trueIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_f17a59e014e74eb5a38824c5a1979784.pdf?index=trueIn PDF document text
    • http://fovodikil.rf.gd/69991124800.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_11eedb249c444a00ae4d796980f666be.pdf?index=trueIn PDF document text
    • http://lufefavi.epizy.com/commodore_64_for_sale_nz.pdfIn PDF document text
    • http://nafaloputazesoj.rf.gd/uniform_circular_motion_questions_and_answers.pdfIn PDF document text
    • http://mefadagisi.rf.gd/acomea_performance_a2.pdfIn PDF document text
    • http://retugizi.rf.gd/46481764362.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 5168 bytes
SHA-256: 86f91a3a646c207f19b9d648f11a25f0958f279f1900668fbe3ad7701b3c52c2
font_01_sfnt_off00011530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 10608 bytes
SHA-256: 8dcb38e66c6a9597c8fe9f071e68c1bb57203418ae2b4c60a6ccd2c0e938985d

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