Malicious PDF — malware analysis report

Static analysis result for SHA-256 b886fedaa9117491…

MALICIOUS

PDF

120.5 KB Created: 2021-03-16 09:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 978b817e89bbd9d6c1a9374a8941c5a4 SHA-1: 409fef74cec3cfa2c49402420e914d07092700ab SHA-256: b886fedaa91174910e4f35246fce2ff34391972be0fb4315d06dbe106840e7df
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://fokemale.ru/wix?keyword=apk+downloader+for+chromebook PDF link annotation
    • http://canonsburglake.org/free_chess_app_for_android_tabletkss3v.pdfIn PDF document text
    • https://jigugupidutugi.weebly.com/uploads/1/3/0/8/130813301/vawezugav.pdfIn PDF document text
    • http://reduslimitalia-official.site/rudurupokaribo1pj.pdfIn PDF document text
    • http://slimitalia.space/color_by_number_new_coloring_book29e7s.pdfIn PDF document text
    • http://datingdate.site/jasitowudorewurituwazopulaf.pdfIn PDF document text
    • https://cdn.sqhk.co/tavimuxeju/hdjbjgi/vejuvekaleninasozuxerobu.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/amazing_grace_my_chains_are_gone_chords.pdfIn PDF document text
    • https://wirujiko.weebly.com/uploads/1/3/4/9/134900452/jugolos.pdfIn PDF document text
    • https://voperupazekeko.weebly.com/uploads/1/3/4/5/134505312/mokibudexo_timaguwaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379230/normal_5ff91885ec6a8.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/6ibO6RT/dark_raider_hack_apk.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/dimifexurufeje.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/ibkA3jb/genovokurixazefalune.pdfIn PDF document text
    • https://zeruposizagaki.weebly.com/uploads/1/3/4/8/134854722/rowulagimodetimivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5ffb11cf31430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_6025b6d4384bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5feb0a8cac9a8.pdfIn PDF document text
    • http://bilkaita.space/fundamentos_de_enfermeria_kozier_8_eld4hy.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/cadastral_information_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5fd9c09a77625.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/befafuni/60754233666.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/edouard_glissant_poetics_of_relation.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/25898430755.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/metformin_1000_mg_tablet_size.pdfIn PDF document text
    • http://kusababi.onlinewebshop.net/nursing_bed_making.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/maya_angelou_still_i_rise_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/gilemis.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_off00019a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A91 5504 bytes
SHA-256: 32c571ca27c16a12bd28f9994a8f3edb59c9e4d83c56691d1715010d852b3d54
font_01_sfnt_off0001ad33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD33 11416 bytes
SHA-256: c4f5afc1d2fe4691c707ba325eeec761dad8e9202467ee569537d36fe1f7600b