Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2f676119d8a190…

MALICIOUS

PDF

77.0 KB Created: 2021-05-29 13:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b0cc8d787052b74399ea872270978334 SHA-1: 4f18e05386b46728c5f7e1335220550b23fb3eb8 SHA-256: cc2f676119d8a190b45b6aacf331687d44a3aeecc61768d5a2fbf74d79420f6d
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful sites, likely as a phishing lure or malware downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=the+planets+jupiter+piano+sheet+music+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449622/normal_602ecd5b1b91c.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/3425481.pdfIn PDF document text
    • https://sipusojatavajuw.weebly.com/uploads/1/3/4/6/134606658/fewoxinokapekato.pdfIn PDF document text
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/8967816.pdfIn PDF document text
    • https://foseludi.weebly.com/uploads/1/3/4/5/134592848/9c56f7ac1b69d.pdfIn PDF document text
    • https://wemoloxemud.weebly.com/uploads/1/3/4/6/134603697/zuxamajen-wubixi-pijekaliv-sosurigefibokij.pdfIn PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/kikulujafelasopepub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_6036588b3048c.pdfIn PDF document text
    • https://mupimafab.weebly.com/uploads/1/3/4/7/134728659/tumotesopig_kiwewep_sufifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_6000d79f2ae33.pdfIn PDF document text
    • https://zepukuliro.weebly.com/uploads/1/3/5/9/135964459/6070648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_5fd3722c0540e.pdfIn PDF document text
    • https://fisizupesaxog.weebly.com/uploads/1/3/1/6/131636899/pepanawuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8703a37b-95b8-45cb-8ed8-a122a3650e99/how_to_fix_f06_error_whirlpool_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2c6109-fa06-46cc-8eb5-53609da1c056/tales_from_the_loop_review_rpg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bac6e21-18cf-4d98-9db4-6730ac0c30e8/marine_radio_channels_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfc69d3-df7f-4ac9-9e2a-fa51e2864ed6/what_are_the_qualities_of_a_good_husband.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92da695f-18da-45d5-895d-9096a924652a/que_funcion_cumple_las_amigdalas_en_el_sistema_linfatico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bde67db-0d2a-456b-98ac-3bec2aecd8c7/jisegupuxifilekixaruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db6b654-157c-4d64-b2ed-abb70fd639af/xomuzogifadopaxomegikivo.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_off0000ee52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE52 5420 bytes
SHA-256: 283cf7de5bc179fc48ddcafcd6c9cfa048a7465c7196256ccc53f3b88f2083d2
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 11180 bytes
SHA-256: 577d54401452465a9addce5eba58c4c6a4a24c80a843e97352173c90a5dac245