Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3be54879aef802…

MALICIOUS

PDF

67.7 KB Created: 2021-02-01 08:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 57f56b1670f2709d32384eabd2e7f2bb SHA-1: 7bc9104b518146007d0c8ac57fc56ca7ed5e4a40 SHA-256: 5d3be54879aef802c5c83a32d9217711721b06d518c24a6c753b2b8b9d9e28be
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely directs users to download a password-protected archive, a common tactic to bypass gateway security. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/aws?utm_term=printable+child%2527+s+hand+template PDF link annotation
    • http://bcpzonasegurape2-viabcp.com/valiant_mobile_password_resettbmf0.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/megudowinev.pdfIn PDF document text
    • http://femokotafi.66ghz.com/fotidekijodulorigavesa.pdfIn PDF document text
    • http://vatasefapulik.iblogger.org/labview_arbitrary_waveform_generator.pdfIn PDF document text
    • http://lupaper.22web.org/statistical_test_cheat_sheet.pdfIn PDF document text
    • http://xojitufos.66ghz.com/wifidosigubeni.pdfIn PDF document text
    • https://bomupafevusoze.weebly.com/uploads/1/3/1/4/131407549/e7bb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417315/normal_5ff3a7475528a.pdfIn PDF document text
    • https://jozemaxeg.weebly.com/uploads/1/3/0/9/130969614/pubarizijer_pikezas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5fc6c3f7f1d88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_5ff95fd8e6e57.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/rusetodofumi_wisudugetugun_badejasojo_basonozavufe.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/xatejenufofava.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/5598757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavofedelozus.rf.gd/dinumi.pdfIn PDF document text
    • http://rujolur.rf.gd/guitar_neck_jig_template.pdfIn PDF document text
    • http://zuzofigub.rf.gd/castlevania_symphony_of_the_night_soundtrack.pdfIn PDF document text
    • http://vopepogam.rf.gd/pusoti.pdfIn PDF document text
    • http://lanotiwigizoxep.epizy.com/characteristics_of_good_information_system.pdfIn PDF document text
    • http://renureva.epizy.com/lejuxoregajofaxadifowix.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/bobilawijojonok.pdfIn PDF document text
    • http://sinalowus.epizy.com/crisis_management_plan_template_business.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_off0000d0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 5488 bytes
SHA-256: df4e7ddb9d4d0f1f69330b5772f0996bb80d81db899b2a63f9709baf82a2e0e1
font_01_sfnt_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 8784 bytes
SHA-256: 3fd8cbca1dd3f8178bf2aa87da480d8cd7ca5fb51170cc318ac0a4d95899619a

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