Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b21f9a808273d63…

MALICIOUS

PDF

79.0 KB Created: 2021-03-28 04:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a6ffb44a72947ceae3c6a4a9b67596e3 SHA-1: 7101013030318dc381612e01fbac7631c037ddc6 SHA-256: 3b21f9a808273d63543d6d1e0936ef1bd54706b17a5fe8e3a6ca7dcac858c1bd
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to sewing machines, directing users to a suspicious domain. The presence of numerous external URIs and link farm characteristics further indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=clases+de+maquinas+de+coser+industriales PDF link annotation
    • http://falorilipeb.mywebcommunity.org/book_hotel_24_hours.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/hillsborough_county_school_2020_start_date.pdfIn PDF document text
    • http://dadavusitolepik.22web.org/25525635967.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/tirudezu.pdfIn PDF document text
    • http://gafaneripebenu.iblogger.org/tomizipefezuzofada.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/arquitectura_mexicana_contemporanea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_66e2feb575cc4aa2b00b5dbb77d0ab50.pdf?index=trueIn PDF document text
    • http://xebenuxod.rf.gd/cemetery_gates_tab.pdfIn PDF document text
    • http://ponadenu.epizy.com/exit_interview_document_template.pdfIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_13fe479599af4466a6e9b44f1e224ded.pdf?index=trueIn PDF document text
    • http://dezoruxeg.epizy.com/linen_cotton_blend_sheets_reviews.pdfIn PDF document text
    • http://ponuruv.rf.gd/sovepusulojajotaj.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/osteoporosis_prophylaxis_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/wulapejede.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_1b2696909f9a4a75acc3e7da823947b2.pdf?index=trueIn PDF document text
    • http://vonizupereru.rf.gd/97451567953.pdfIn PDF document text
    • http://dubanexotokegel.myartsonline.com/body_worksheet.pdfIn PDF document text
    • http://bojaxalajavog.epizy.com/mewiwuvedajodimevik.pdfIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_8129e7d6771941e08f040689c7e1fc75.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_06b5126501e141c2b83a8dd7522b0b45.pdf?index=trueIn PDF document text
    • http://dadorisisewane.epizy.com/lurobosufirutomepivi.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_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 5116 bytes
SHA-256: bbe30abb5ab16369fb37d4e43063a8499d4909dfe4e8971a775e1e304cb97fc7
font_01_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 11844 bytes
SHA-256: cecea4b0a90547b87cd9c651dcc9d3dd7c21f47f5bd69009c48121211c150642

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