Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e355d354bd175b…

MALICIOUS

PDF

73.2 KB Created: 2021-06-13 19:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 66ce01749d75cbc11a74b5f231181506 SHA-1: 15c927b439d6ec5b6ef3c1940ea937fe9c3a2e64 SHA-256: 32e355d354bd175b4012191f003df97b6df42741bc5166142e678eae11f21224
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://archism.ru/pbw?utm_term=minecraft+pe+apk+0.15 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392441/normal_6058fa4cbda12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486054/normal_5feff2b907b68.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/vevileguj-jusovazumevulu-xiduvosufom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_6015c277e89e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd3120fb78e8.pdfIn PDF document text
    • https://muwigoxafom.weebly.com/uploads/1/3/4/8/134869335/mupesopumebegi.pdfIn PDF document text
    • https://newafiramolik.weebly.com/uploads/1/3/1/0/131070062/xikuvixemoji_fanadifojijir_bageduxovar_kaliwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496170/normal_60c16f040030e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388612/normal_60c129f58f585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482406/normal_601743cd6b23b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wezenibafasi.pbworks.com/w/file/fetch/145164732/kezuxoxusipuxubirosabe.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/f/la_soledad_de_un_cuerpo_acostumbrado_a_la_herida_poemas.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/145159863/jawoxukovixavodis.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/90028558684.pdfIn PDF document text
    • http://dujimowiwup.pbworks.com/f/need_for_speed_no_limits_cheats_ios.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144746304/ejercicios_resueltos_de_oraciones_compuestas_yuxtapuestas.pdfIn PDF document text
    • http://vazexetuv.pbworks.com/f/62989340366.pdfIn PDF document text
    • http://fuxedom.pbworks.com/w/file/fetch/144851889/mejores_libros_de_nutricion_y_deporte.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC903 5220 bytes
SHA-256: e16e5e6ca725a362c87a192e386f12bc4d47a77a831b05ec7d4bb56a050165cc
font_01_sfnt_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 11224 bytes
SHA-256: 6a45f7376e2837092416a86c1e31991c087eb8de5875341658f8a34c87089902
font_02_sfnt_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 16084 bytes
SHA-256: 3df396bd5aa6cefa320f9cacff41cd9c7b86eae6baaae34b2f4d98ec42a5b82d

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