Malicious PDF — malware analysis report

Static analysis result for SHA-256 f107b1f571fe9c8b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-24 01:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8f0d0eabe3d2cf8adab3229b97e04d28 SHA-1: 733bca37ef32277a61cb4b36ebb3fc5f09835fbe SHA-256: f107b1f571fe9c8b10e77d3dc2c7362ae985b278304aa2b6510016f8b64fcff1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=linksys+ac1200+wifi+range+extender+re6350 PDF link annotation
    • http://the-english-temple.com/honda_hs928_shear_bolt_sizexg9p7.pdfIn PDF document text
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/rewejelamav-jexod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_6049ac634d164.pdfIn PDF document text
    • http://vir-tus.com/position_of_adverbs_of_frequency_exexus7i.pdfIn PDF document text
    • http://1yamal.space/2683960723u1zlb.pdfIn PDF document text
    • https://wotuterivakevom.weebly.com/uploads/1/3/4/6/134608936/zanosepukubapigutar.pdfIn PDF document text
    • http://wow50.pro/xugedifadjpvd3.pdfIn PDF document text
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/jolomuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5fd77a383f3d9.pdfIn PDF document text
    • http://poroda.site/90s_and_2000s_movie_trivia_questions_and_answersmje8y.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/jexexijepunib.pdfIn PDF document text
    • http://moneymaya.site/45884877511rksst.pdfIn PDF document text
    • http://usejus.pro/how_do_you_know_when_your_furnace_blower_motor_is_badlh6jr.pdfIn PDF document text
    • https://zafujanej.weebly.com/uploads/1/3/4/6/134602077/benuwegupumakuvuto.pdfIn PDF document text
    • http://milanbeachs.space/jisoztve3h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fe2b342937b8.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/8cee474b-4b62-4422-b385-a7d03ac7a864/vector_smart_battery_charger_2_4_6_amp_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88991cae-84fc-4d54-8b4f-b07980e53237/mouse_guard_comic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6935524c-a0db-4980-a679-4c96ba9e17c4/kigakarub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37896a68-c309-4fad-8620-81f3fdc7b9ae/94692494156.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_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 6192 bytes
SHA-256: 98e7a7ddac6010119d49abf0133ef3c6b1a799e6bdf7806587127f2386fe37b2
font_01_sfnt_off00011007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11007 11500 bytes
SHA-256: 729315a1c06b0b0714ea0d98885dd8eeac1b375f568854845645758890707fab

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