Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e7f75f24cd73c8…

MALICIOUS

PDF

82.3 KB Created: 2021-04-08 02:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 699bc9e9883308d05f704cd4c4579a49 SHA-1: be6e7e1f356ab0ce0c6c774191d47baea2699159 SHA-256: 45e7f75f24cd73c82879d704ca618b81623337f6465c6ee6c444b77048112ace
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of a URL related to 'Arnold schwarzenegger book pumping iron' indicates a potential lure to a scam or phishing site. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely for credential harvesting or malware distribution.

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://ponafet.ru/strik?utm_term=arnold+schwarzenegger+book+pumping+iron PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485436/normal_601eeb80bdbb3.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/vthf2jb/zavabige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465012/normal_5ff691c80d999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_6041bbe056a54.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/jHhifZh/marvel_super_heroes_coloring_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5fcdf6870358f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_606877d9a8d92.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ygehgev/pais_de_los_juegos_my_dolphin_show_5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5ffb4f007313d.pdfIn PDF document text
    • https://cdn.sqhk.co/murofoli/vWjfOie/pudifinozufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_5fdba030ab7f8.pdfIn PDF document text
    • http://xenipufuk.22web.org/barbie_room_decoration_games_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_60256a73a3abe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_6004394f01484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5fd6149f1416b.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/UaggQ3c/80260778864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_9b4f6114bcc84ae9a5bc78bd3c24935b.pdf?index=trueIn PDF document text
    • http://ludilisi.epizy.com/bowanujakulavageg.pdfIn PDF document text
    • http://kekabipiji.rf.gd/tipebirufidegitafuwikalol.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_d244a41d5411474285f20e9fa1451b89.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 5824 bytes
SHA-256: d639404f031ff789956e97ba212de67a48346b6297bb7193994117b86ec7dd6e
font_01_sfnt_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 11128 bytes
SHA-256: 42fe230c5ecf6fe4d6563f650350fbb001df67b4ebaad4fc2b846a8e011e367e

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