Malicious PDF — malware analysis report

Static analysis result for SHA-256 b878aee7237b4f1f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-22 05:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af34403728d35c65b77c97f5d282f84f SHA-1: 134414afcf915e95f3e9b6590ba091b44f86101f SHA-256: b878aee7237b4f1fe25a4f7006474f1a29e42554a4122e6da66f504b807a46dc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a large external link farm. The ML classifier and ClamAV also identified it as a phishing trojan. The document contains numerous links to external websites, many of which are likely part of a SEO link farm designed to manipulate search engine rankings or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=conjunction+worksheets+for+grade+7
    • http://top-agent.ru/directx_setup_errortvhrt.pdf
    • https://vinipuzi.weebly.com/uploads/1/3/0/7/130776781/6257867.pdf
    • http://whysmall.space/how_to_think_when_you_draw_with_lorerxqmj.pdf
    • http://ryukzak.digital/jane_eyre_quizz2ihq.pdf
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/7148008.pdf
    • http://anarchymedya.com/how_to_start_contempt_of_court_proceedings7pf4e.pdf
    • http://philonio.online/public_administration_graduate_programs_nyccfnsp.pdf
    • http://hookup153.online/who_is_the_strongest_gods_of_destructioncsvpv.pdf
    • http://mesretly.xyz/texavepidobofolosezuwl74x5.pdf
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/072f67c976543f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xewaditina.epizy.com/how_to_set_auto_on_black_and_decker_coffee_maker.pdf
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_f5857ce30d0647f092465a9d87339fd9.pdf?index=true
    • http://suludigana.epizy.com/fajapivexepozazagoke.pdf
    • http://nagajawonusagu.epizy.com/xobumit.pdf
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_bfb386d31a4646e9a1b11b994607b3c2.pdf?index=true
    • http://bexalaxawuwe.rf.gd/74674846710.pdf
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_049af43b6c4047a9912de5a5eaa593f5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8c37770d-f92d-45f1-862d-4877b3174dc9/73514500467.pdf
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_7cf57b1e5f84455ea98e35ac1d47be25.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1bfe8c8d-3651-4dd6-bfbc-0c294f0f5b27/the_narrative_of_the_life_of_frederick_douglass_questions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e646.bin
ed05842772f2d43de1bf6601a93fef44c3fc3ab970c9d194470d27fb05e7b717		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 5468 bytes
font_01_sfnt_off0000f8f9.bin
0993520be9469b9c6b92385f3efe27b1cdb6fef0936c02f99042b4725759babc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 10504 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.