Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3d20a881380d10…

MALICIOUS

PDF

91.6 KB Created: 2021-03-12 16:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 44a76a515b0af848f6711a269979c2f7 SHA-1: 29baa802b1f60047dea45e5800ec9fd8b5455fce SHA-256: 1c3d20a881380d10dfaeaa9171895af4d8dfe06fb33f079bdb5979fed60699de
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=what+is+the+chemical+formula+for+olive+oil PDF link annotation
    • http://xosubowavenu.mypressonline.com/how_to_learn_spoken_english_fluently.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/ccfwAps/53491746128.pdfIn PDF document text
    • http://3gusevshop.website/94078339916wm2x0.pdfIn PDF document text
    • http://xigegojaliku.iblogger.org/auto_da_fe_elias_canetti.pdfIn PDF document text
    • http://cuzinfo.ru/kit_fc_barcelona_2021_dream_league_soccervt98r.pdfIn PDF document text
    • http://apsdd54gfv.xyz/doki_doki_literature_club_base64l19qq.pdfIn PDF document text
    • http://romeoplanet.club/16214876955cons6.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/gadim.pdfIn PDF document text
    • https://cdn.sqhk.co/folikulezig/dTvsXJ1/dragy_app_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ghidkcz/caracteristicas_de_la_novela_picaresca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_9a8d5fb1098841428a07d2258f8ac111.pdf?index=trueIn PDF document text
    • http://zerozuru.epizy.com/como_aprender_a_falar_frances.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/ma_pass_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/cpt_question_papers_with_answers.pdfIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_b3ef760a0f6c4bf5be66de5f4bbd3368.pdf?index=trueIn PDF document text
    • http://garapaf.epizy.com/toyota_slip_sheet_forklift.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/the_hobbit_full_movie_free_download_in_tamil.pdfIn PDF document text
    • http://labutebumir.rf.gd/49437598006.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/manunawegam.pdfIn PDF document text
    • http://zuputes.atwebpages.com/mujapogetu.pdfIn PDF document text
    • http://rakixufemagotut.atwebpages.com/space_oddity_chords.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_e74b7c85e85b432180489d03e2290c4f.pdf?index=trueIn PDF document text
    • http://weferobiditikun.epizy.com/solving_absolute_value_inequalities_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/dapewumujurud.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_off00012b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1A 5192 bytes
SHA-256: 0b03b3113d79f0f3159779c013d1eab17639f1561feb3d25a8b7c152817437c4
font_01_sfnt_off00013cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAD 10612 bytes
SHA-256: 15d360543128a195533977a191c0b6c6ea4090ec748f707fb5216465731f94c4

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