Malicious PDF — malware analysis report

Static analysis result for SHA-256 1444ea6013ba0940…

MALICIOUS

PDF

76.9 KB Created: 2021-04-20 16:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 16dd02895bcc3c279f702b2df53c02e0 SHA-1: be710d90c77eb8b30cc7678e1e76c3f37a19fba0 SHA-256: 1444ea6013ba0940fcca1bf1f897d77a3208e552f429255b39ef81db74542cb1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains text related to 'Star Citizen ships by cargo capacity', likely a lure to direct users to external URLs. The presence of numerous external URIs, including a link farm on disposable hosting, strongly suggests the document's primary purpose is to redirect users to malicious sites for further exploitation.

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://golowaki.ru/strik?utm_term=star+citizen+ships+by+cargo+capacity PDF link annotation
    • http://kavelizopepi.mywebcommunity.org/wogodimafarowiwikawo.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/start_your_own_cleaning_business_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/jtigTbP/pigesejazugixedi.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/cultivo_cebolla_china.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/fervent_book_study_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/whcNFC2/urban_ninja_project_richmond_kentucky.pdfIn PDF document text
    • http://bitunowaluf.sportsontheweb.net/99_names_of_allah_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_600de0a7ef4e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475582/normal_5feff3bae6f79.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/G7fFggb/cheap_camera_for_magic_lantern.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5fec08491f536.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/iehdieV/63972613647.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/Sr3ijgf/buddy_toss_mod_apk_techylist.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://leparitupoxow.onlinewebshop.net/nenumiwutanovopisukon.pdfIn PDF document text
    • http://lafafodewasu.rf.gd/orasadha_usurathan_album_song_masstamilan.pdfIn PDF document text
    • http://falariwupap.myartsonline.com/budismo_gratis.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/autoestima_para_nios_feldman.pdfIn PDF document text
    • http://dotixoxikal.rf.gd/34707895039.pdfIn PDF document text
    • http://vorasatijede.rf.gd/denon_avr_x2000_price_in_singapore.pdfIn PDF document text
    • http://sirowozikuko.epizy.com/mexizijodosodug.pdfIn PDF document text
    • http://romolote.rf.gd/masapakotivufo.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_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 5560 bytes
SHA-256: b47d352d6f628085e522bbc1180d58baca29d19362ccbe747c07bfcdb6f7c983
font_01_sfnt_off000100ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FF 11312 bytes
SHA-256: c5eff3ec0791d2fbb56099b71155ed7ab9c11e4b2fbbf7668de1d61d02aeb527

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