Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab86e0d036a2493…

MALICIOUS

PDF

73.7 KB Created: 2021-02-19 11:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c7cebf481a57aede19180ebbb848090a SHA-1: a064f6974b7d82f1f5c4a228f9e87592f00ec64c SHA-256: 0ab86e0d036a24937c3a7d626d4ac0a8d1b93a2693f90afadfb264c4938b7aea
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its extensive use of embedded links, many of which point to known malicious redirectors and disposable hosting services. The document appears to function as a link farm, aiming to redirect users to potentially harmful content. The ML classifier and ClamAV detection strongly support this assessment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=govinda+namalu+telugu+movie+mp3+songs+free+download In PDF document text
    • https://sozamevojor.weebly.com/uploads/1/3/5/3/135309273/keboda-nulubibubisuk-sibatimi.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/lilugefuwupapep-mogivitej-xibap-kizepezi.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/RXgfXkf/monster_truck_cake_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/YeTxhek/lusupe.pdfIn PDF document text
    • https://nabaduvikarupad.weebly.com/uploads/1/3/4/0/134096068/vufarepeto.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/mXtjcck/93763831293.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/jjLslhd/hitmonlee_best_moveset_sword_and_shield.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/Foge5et/67689029245.pdfIn PDF document text
    • https://cdn.sqhk.co/lewovazu/gi7ies5/41522272777.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/ifyS7Pq/deparupepuzekitu.pdfIn PDF document text
    • https://mapijilut.weebly.com/uploads/1/3/0/8/130873952/a5ead6babcc8.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/jomifag.pdfIn PDF document text
    • https://digikugububim.weebly.com/uploads/1/3/0/7/130774990/potuwememimix_zexizosijiguzax_rugef_ribilow.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/xadubezak.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/fSKQ0GB/real_car_parking_mod_apk_happymod.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/cUH4As6/music_equalizer_free_download_mobile.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanaladu/disputing_stuff_on_your_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/2281588196.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/katy_perry_roar_instrumental.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_off0000dfac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAC 5708 bytes
SHA-256: a34c242b5c2cbd8485a0d13e0e7158a04c2b3f4f54e1f87147198c9a3995affa
font_01_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 11372 bytes
SHA-256: 9e808d3265f74223bdc333587f06316f4f30f906058526dcd9260f601bcd5b84

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