Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b728b4262ffc43…

MALICIOUS

PDF

75.7 KB Created: 2021-02-23 06:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5ae33f291bb09b0b557e95401a35778f SHA-1: f82562d984ec738de28bca6d3674e53f68e0d4c9 SHA-256: 02b728b4262ffc43d5dabb9ea1e2c55ecac556574f73057aed12afdd5767646f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains, indicating a link farm or SEO spam campaign. The embedded URL 'https://jottigo.ru/strik?utm_term=how+to+login+to+alexa' suggests a lure related to account access. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=how+to+login+to+alexa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385863/normal_6012e68f72dc6.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/IheWjea/shooting_games_for_chromebook_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/jfibZhj/burgers_near_me_dine_in.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377407/normal_5ff604b57f849.pdfIn PDF document text
    • http://moitender.org/roiworld_dress_up_games_celebritycjjp7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_60127f2ac2e82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451575/normal_5fec555331c55.pdfIn PDF document text
    • https://cdn.sqhk.co/wowasuperan/gcz6xiM/star_wars_pinball_7_full_apk.pdfIn PDF document text
    • http://mazafaka69pussy.online/shanta_bai_song_ringtone_freeepvq7.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/aidjaCz/blackbird_fly_book.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hgf9Ejb/the_best_bingo_game_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/prV32gg/monkey_fight_game_download.pdfIn PDF document text
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/3f2618e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503035/normal_60048260e2573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_60170945d5fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_602e07cfeb9ae.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/hcGtieR/cardiac_arrhythmias_definition_causes_symptoms_and_treatment.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/9936879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_60313e9ab2b84.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/9b44275048c87.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/vagizarivitaru-bopegebono.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_off0000eced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 4700 bytes
SHA-256: 902c7ae31561cd8fbbee89714191fa2b234901d2194d3c680edc748d0f4e4168
font_01_sfnt_off0000fd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD16 10700 bytes
SHA-256: 8379bd5bb99e82dcc75cab8389cee25fd83feca89389493262083da6ebc4ef39