Malicious PDF — malware analysis report

Static analysis result for SHA-256 458b4e3ec937ab0a…

MALICIOUS

PDF

74.5 KB Created: 2021-02-25 17:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0d2e6129563a9eda413fb0990b035bb1 SHA-1: 7210df1803fd73b425a33ad0c68a5ddd69ca95e3 SHA-256: 458b4e3ec937ab0a3073a7734fdd9245cd097f27fbf5b2017d99042cc9541783
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, indicating it functions as a link farm. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest potential for JavaScript exploitation or redirection to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/strik?utm_term=magic+bullet+printer+cleaner+ingredients PDF link annotation
    • http://lnstagram-copyright-confirms.com/magnet_sheet_near_meyvsur.pdfIn PDF document text
    • http://max-lifting.store/majawebevonantua5h.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/ehg9gcA/the_sims_freeplay_cheats_ios_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/Hjbhher/open_world_best_games_ps4.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/95e216bc0c8b6.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/jCsHzYu/guidestone_counseling_akron_ohio.pdfIn PDF document text
    • https://gezifizisosuvul.weebly.com/uploads/1/3/6/0/136050083/f8e8bf198785.pdfIn PDF document text
    • https://cdn.sqhk.co/fepebage/sQhb8gd/berlin_city_guide_app.pdfIn PDF document text
    • https://gufakapefevem.weebly.com/uploads/1/3/5/9/135994046/625450.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/tabobededemanowozeki.pdfIn PDF document text
    • https://mipejefote.weebly.com/uploads/1/3/4/3/134356111/781e4761a4e51e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/turip/69800040928.pdfIn PDF document text
    • http://xarozitapakegur.epizy.com/keep_track_of_spending_template.pdfIn PDF document text
    • http://reniwen.rf.gd/kokewesokavolomazupop.pdfIn PDF document text
    • http://limulusukad.rf.gd/mosoluvasodexegavosegepim.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/72261499346.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/hays_singapore_salary_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/mafutaziwujirekuk.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_off0000e630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 5384 bytes
SHA-256: 59e0a77d379887ec2d0c20756eb2dbe24be2d7858cafc51c766a44404eea1721
font_01_sfnt_off0000f88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88D 10488 bytes
SHA-256: dac11feaa596ccf58c51fdbaa552132a6058d787c509d19663623cdc9b4181d5

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