Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e65d76528befb0e…

MALICIOUS

PDF

79.0 KB Created: 2021-03-02 04:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 87528ae7207401cb7b9c0759ec5690d5 SHA-1: 15cb7340ff8cd0581e39af165ac262068a8a6ee0 SHA-256: 8e65d76528befb0e6178086adc937664017b72e5c62322402da06daed80597ea
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The primary URL, 'https://lozipotod.ru/wix?keyword=subway+surf+hack+apk+mexico', indicates a lure for users seeking game hacks, which is a common phishing tactic. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wix?keyword=subway+surf+hack+apk+mexico PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416664/normal_5fd17d7d358dc.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/zuxuwasawidivebik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fe80350c54b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_6028913c2ef73.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/39417952476.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/sidetesavapekarasigafoseb.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/e2a3c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_602562cf3719b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529149/normal_5fc8088b958f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_6015ee688e070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadoxosin.atwebpages.com/44948611239.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/after_we_collided_full_movie_english_youtube.pdfIn PDF document text
    • http://gototura.myartsonline.com/john_deere_44_snowblower_gearbox_oil.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/77140666532.pdfIn PDF document text
    • http://zudakilaf.rf.gd/cheap_platform_bed_sets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 5792 bytes
SHA-256: cd2bb467e954fd02b6b96498a06b73ac0d03bea027dc637de22bd00112d4726a
font_01_sfnt_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 10456 bytes
SHA-256: 1543d9fbcb94b836367bc52208de9158e69f249c617299020fa0e2e851d8c4a3
font_02_sfnt_off00011a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0E 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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