Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbf0f0b3ed127f9…

MALICIOUS

PDF

63.6 KB Created: 2021-03-02 16:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 57655ea125abf67086ac34b99bd1ab80 SHA-1: b1a984d742e3f926d849000491575813f5653335 SHA-256: 8dbf0f0b3ed127f9de5f2ad52a87db52785d77de9dee7d0410e33336fdd137fa
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, https://ponafet.ru/123?utm_term=the+maze+runner+2+full+movie+free+123movies, suggests a lure for pirated movie content, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=the+maze+runner+2+full+movie+free+123movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452374/normal_601ead3420f0d.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/c_7.0_in_a_nutshell_table_of_contents.pdfIn PDF document text
    • http://hesap-al-sat.com/reactions_of_metal_carbonates_with_acids_worksheet_answers7tx2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5fe47090d55c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_600ca5ca2da00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_6002582f4a500.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/98093426674.pdfIn PDF document text
    • http://bbcua.site/sniper_3d_gun_hack_version_download2245b.pdfIn PDF document text
    • http://extraterrestrials.space/wofapibawazerisaog6x1.pdfIn PDF document text
    • http://nebo-baikala.ru/bhojpuri_comedy_video_2018_tinyjukeikgk7.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/black.and_decker_hedge_trimmer_power_lead.pdfIn PDF document text
    • http://bitjoms.xyz/intelligence_test_questions_and_answers_freec07vi.pdfIn PDF document text
    • http://blablablacar.online/bangalore_days_dulquar_salman_ringtone5yq17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_600a584c50cda.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/tedowafomaru/is_there_a_sony_tv_remote_app.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_off0000bbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCE 5416 bytes
SHA-256: 4a0b037778ba0da2da20de4e9982ada134277099cc38080f624d5be1a0ae5e91
font_01_sfnt_off0000ce20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE20 10284 bytes
SHA-256: dfde8b71a1497c7cdf55475f87f61e23eb2102b6edcd721b18e1ca01933e6fe4

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