Malicious PDF — malware analysis report

Static analysis result for SHA-256 1280834f0bb48369…

MALICIOUS

PDF

83.0 KB Created: 2021-03-18 16:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f5dc050fc35d648c021fc1dd2c750bcb SHA-1: 217db1c2f0f7c9c7e2c9e6088448ebf7bf78d226 SHA-256: 1280834f0bb483694d1e46154a6d077d1633f6a9bed13d963ae340c13317cd9f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://xezojetit.ru/123?utm_term=chalte+chalte+mohabbatein+song++pagalworld PDF link annotation
    • https://jovimujokuva.weebly.com/uploads/1/3/2/6/132695493/baxekitez-pazufuriwuloles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_6022333b4cee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5ff52e04049a0.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/Y1gghgq/88514493818.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/gfWjagI/kifodonisarupirabi.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/oignhcD/morning_alarm_ringtone_telugu.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/9550812407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477916/normal_5fd34d5b245a4.pdfIn PDF document text
    • https://vuwakoge.weebly.com/uploads/1/3/4/3/134368269/219792.pdfIn PDF document text
    • http://libralab.digital/the_negotiable_instruments_act_1881_multiple_choice_questions_and_answerss2eyi.pdfIn PDF document text
    • http://olivamebel.com/benovimedencrwdc.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/UjiysyI/flipper_pinball_3d_gratuit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_600e8ad973ba8.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/nekegisa-zawime.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/microsoft_sculpt_comfort_desktop_setup.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/bacteriophage_vector.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/konorisutimom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5fc949910cf4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dudufimapu.epizy.com/reactive_attachment_disorder_dsm_5.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/brand_guidelines_example.pdfIn PDF document text
    • http://vojovis.epizy.com/vonakasonopik.pdfIn PDF document text
    • http://guvukexapa.rf.gd/arizona_civics_test_answers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 6536 bytes
SHA-256: 96d2c15f9600a280bb9809310d5d3703dc193243235364019f1ef98d7ecba316
font_01_sfnt_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 5532 bytes
SHA-256: ca4863c33b3922588566018f31e6c85ee5b455a1c0cbd49d7952bacac9dfdfa1
font_02_sfnt_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 4452 bytes
SHA-256: 50ad8a8795b0c77dfd3952265d7c7bff5a3b8cba501eec25b9671bfea16b6a2d
font_03_sfnt_off000109a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A6 11360 bytes
SHA-256: d2a4158c821003f1b441ee68ed2487fa08b68ab09e2975f90ed80a731278b4cf
font_04_sfnt_off0001306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378