Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d67e6e2c494216…

MALICIOUS

PDF

92.3 KB Created: 2021-04-04 08:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 93d7d4689d71bf6a736fe2840a3a0bc8 SHA-1: 28855b6f2497c41801c556e856dc5c865ad81b07 SHA-256: f3d67e6e2c4942168e938df39375fd7d74198566af3779c86f23c870c0527bdd
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, forming a link farm. The document body, though heavily obfuscated, appears to be a lure related to 'subliminal affirmations', directing users to a URL that likely leads to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=does+subliminal+affirmations+really+work PDF link annotation
    • https://cdn.sqhk.co/vobipibomuk/jcYDtja/71325217402.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/havEGhd/auto_reply_facebook_messenger_personal.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/RGhjo8w/the_zombie_song_mp3_free_download.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/CXhdhgG/40800662449.pdfIn PDF document text
    • http://sollabs.xyz/10_professional_chicago_electric_tile_sawt00rn.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/jfgdFgd/zatasubaxur.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/gdkBjhg/73160472713.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/SehigfI/carrom_pool_game_free_download_for_pc.pdfIn PDF document text
    • https://gosasaweju.weebly.com/uploads/1/3/1/3/131384289/4e58379b56acde1.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/bhigihh/electric_guitar_parts_kit.pdfIn PDF document text
    • http://4d-5d.com/fedagonikilodirados6b7m.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/iehfsji/37514317219.pdfIn PDF document text
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/tagafexeweves.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/9f6a20.pdfIn PDF document text
    • http://dress-russia.ru/closest_harkins_theatres_to_mew6yxn.pdfIn PDF document text
    • https://dogewirezuv.weebly.com/uploads/1/3/4/6/134699505/sutiku.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/egjd5ie/animated_speaking_characters_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/qghRM2o/ulala_idle_adventure_guide_assassin.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/ibiahgd/jotixibidoxobusupiwe.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/fd09f0a5d655b7.pdfIn PDF document text
    • http://akvatehnika74.ru/17836583649d7pod.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/hOicaZa/10596757921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B84 5312 bytes
SHA-256: 0905ac2f7070e8a5ed4d142f563ab531fbe025b3fb849de9e65701126a4f7277
font_01_sfnt_off00013d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D99 10708 bytes
SHA-256: d8f2f9a640e987c349fda3a24cc2fd49e1bec5ed1cd58ed62bd23d4a91b2cdb3