Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b5d872e83bb9c0…

MALICIOUS

PDF

76.9 KB Created: 2021-05-02 08:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6467d9b5bf4ba4e3b8b97efb9ce1e54b SHA-1: 20af3305dde9919d65303fbb743e5041aca9aa70 SHA-256: a3b5d872e83bb9c05e1dfc38733fbf050ab5bae1f78342c6aa41f343165661df
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are associated with potentially malicious domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, and 'CLAMAV_DETECTION' confirms it is recognized as a phishing trojan. The document body, though truncated, suggests a lure related to a 'Mac user manual pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=mac+user+manual+pdf PDF link annotation
    • http://brightshopbg.xyz/81796804590pe5jq.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/jaXN8sG/evil_hunter_dead_zombie_survival_mod_apk.pdfIn PDF document text
    • http://setlyb.online/yiruma_river_flows_in_you_piano_notes_easyydifh.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/fkiglhf/slot_games_that_pay_real_money_no_deposit.pdfIn PDF document text
    • http://gbo.guru/7688518258b0xxb.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/jhNaqie/cookie_cats_blast_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/minutakumu/Mqlhbjd/ableton_template_maschine_mikro.pdfIn PDF document text
    • http://domsale.xyz/63876318056ee0rj.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
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_bcec83ea77c948f9af031a1104917eb4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/how_to_perform_fugl_meyer_assessment.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_ec1027293bb1487aab9b7f48b4969289.pdf?index=trueIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_d9672a8da7214a24aaf4d622b5e1884d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/nujevukixajiru.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/tijewu.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_ae4209f805704587ac359bcdebd980e4.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_fdb44906c4b5417d836cd3f07c31255c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/what_does_all_over_but_the_shouting_mean.pdfIn PDF document text
    • https://7b8833d7-014c-4875-9c37-56438ffeb98a.filesusr.com/ugd/ccf209_85b7832521ef46ea9605010618bb02c5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 4948 bytes
SHA-256: c1237d488e022580a5e7ec4374481b1b437d504490e060b2c8df6feb344bca88
font_01_sfnt_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 11340 bytes
SHA-256: b8ed6c8c5f42e53fed3ad8197f0753c5f169fc533676bc6fe3d552ee2cfa0a8d
font_02_sfnt_off000118b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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