Malicious PDF — malware analysis report

Static analysis result for SHA-256 2567d3b95028e99f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-21 02:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3ce6ee511cd1a4adf8093ac610290698 SHA-1: ed50c41275e99d177a1705e39772784f318bb12a SHA-256: 2567d3b95028e99f5ecbcb9d739b7501196649361e234c68a5002993f2a80fae
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The primary lure appears to be related to '50 shades of grey movie sequence', suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to lead users to phishing or malware distribution sites.

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://xezojetit.ru/strik?utm_term=50+shades+of+grey+movie+sequence PDF link annotation
    • http://tradebot.space/befojikujutocvrm8.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/ligUsjf/dining_table_set_for_6_round.pdfIn PDF document text
    • http://zelumefepa.sportsontheweb.net/75939630670.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/el_hobbit_un_viaje_inesperado_netflix.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/why_are_radial_arm_saws_no_longer_made.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/79610377818.pdfIn PDF document text
    • http://vuvodagedene.scienceontheweb.net/mechanical_design_of_machine_elements_and_machines_a_failure_prevention.pdfIn PDF document text
    • https://cdn.sqhk.co/lovaxixifew/gf5ovie/bee_bot_mats_free.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/YEoghGY/cake_recipes_for_dogs.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/76236428895.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/eyWgjhj/board_games_for_5_year_olds_walmart.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/research_journal_of_pharmaceutical_biological_and_chemical_sciences.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463807/normal_5ff42ac0b86c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_6015f1e35bb6d.pdfIn PDF document text
    • http://phulop.store/86060285004k2yqm.pdfIn PDF document text
    • https://cdn.sqhk.co/pupoxobumake/giiRgii/top_30_hashtags_for_instagram_followers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_601fb2694009e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5fe448d1a9288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_337eecf17dd9481d847efe53b8e5a6c8.pdf?index=trueIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_b6966d4cc8d44aad9e72e1710c6bd50c.pdf?index=trueIn 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_off0000f893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 5860 bytes
SHA-256: b66ce14ac1b74b474682a35ba68e5594aeccc89f419379deec19afced78f30aa
font_01_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 11156 bytes
SHA-256: e223fe6b4fe5f537f7aa279c8fd0a2ef2b31691df6b0d707def4cefdf50baed2

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