Malicious PDF — malware analysis report

Static analysis result for SHA-256 79be1629c10e4024…

MALICIOUS

PDF

77.4 KB Created: 2021-04-02 21:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f504a953c4863af9a9eb0a1f2ac1b665 SHA-1: e252b6348585134d560b58d439c158c86281bb8e SHA-256: 79be1629c10e4024a5420fcfcd909051aeda528e0bb55b5069e22b823caf53c5
126 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and a link farm heuristic further supports this, indicating the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://lozipotod.ru/strik?utm_term=bose+acoustimass+10+service+manual PDF link annotation
    • http://titanof-filtr.ru/former_ceo_en_francaisyb0le.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/QgdihiN/hand_tossed_vs_original_pan_dominos.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/TSighhJ/89571053598.pdfIn PDF document text
    • http://save50it.info/ley_de_ohmiosmauw5.pdfIn PDF document text
    • http://infokurs.design/677300615945dky8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_6010a00226771.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/5jhegdN/6548046442.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/sat_december_scorev5d3z.pdfIn PDF document text
    • http://gdztut.com/dumulipuromil1l1tn.pdfIn PDF document text
    • http://brettlockhart.com/xokodumetowfgh1.pdfIn PDF document text
    • http://rusherx.studio/66528535679zscvq.pdfIn PDF document text
    • http://zuzutogutid.22web.org/fujitsu_fi-6130_win10_driver.pdfIn PDF document text
    • http://wenenejenataf.iblogger.org/analgesia_obstetrica_2020.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/19623534520xdhab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_6043564a588b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fffa3056ba1b.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/7hcdfqQ/wet_stone_knife_sharpening_wheel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383573/normal_60159e3ec25a8.pdfIn PDF document text
    • http://clubstore.pro/693300777174frjb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5feb2cfa8f137.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/dcge9hj/70940230445.pdfIn PDF document text
    • http://arm-watch3.club/witcher_5e_classtcuoa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibekemuxeni.epizy.com/algebra_questions_and_answers_year_8.pdfIn PDF document text
    • http://jigipowomazavas.rf.gd/beginner_to_advanced_python.pdfIn PDF document text
    • http://gogegoxo.epizy.com/all_abbreviation_of_computer.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/bahishti_zewar_urdu_book.pdfIn PDF document text
    • http://nutajowaga.rf.gd/biochemical_assessment_of_nutritional_status.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_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 5248 bytes
SHA-256: 0d1ac01dbecb0cb60ec1d382e1ad6a6ed2c55de46ef3d343c093f651199f0f68
font_01_sfnt_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 10724 bytes
SHA-256: 960b4e1da40fe89e20b6d286da5bf418448bb659766d2ab9366589e6777d34c1

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