Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cc628a0f51462b…

MALICIOUS

PDF

127.2 KB Created: 2021-03-10 09:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e68db1eb2a94b764900b73a4f1951686 SHA-1: 2575f98f58d00fa99c6144604bf653aa1892b53d SHA-256: 62cc628a0f51462b63714b81db5e86fd0191ac06e8bc37b1d700701f4783bd2a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded document body, though heavily obfuscated, appears to contain search query-like text, further supporting the lure-based attack pattern. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

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://soxebez.ru/aws?utm_term=is+a+2005+chevy+malibu+a+good+car PDF link annotation
    • https://cdn.sqhk.co/wupetutigo/e2Vjcja/3082509133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_6029923b5c589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_6024673c8eb06.pdfIn PDF document text
    • http://nolubebizufusim.iblogger.org/dofomu.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/RhiYrlG/garena_arena_of_valor_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/qhdP5Ya/change_color_of_part_of_image_in_powerpoint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_600caa10db1b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382617/normal_5fe5516fd77b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5fcb6dbd17d8e.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/JWW2Zgi/pujufozunikakuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jjhbY4I/terraforming_mars_prelude_expansion_buy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_d14886d45dfb458ca892922a1470877b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zamuriza/babemizuzunarowofewut.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_59b52fba64c640dab1797b219ca32716.pdf?index=trueIn PDF document text
    • http://rezopaduj.epizy.com/what_is_the_normal_a1c_count.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/armored_core_for_answer_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/75117900971.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_93f9dd6397f246df95a45db9276e1edb.pdf?index=trueIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_7a9b157cf94e4d2fa4db72d47d0d9d2c.pdf?index=trueIn PDF document text
    • http://jisevara.rf.gd/archbishop_ilsley_catholic_school_uniform.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_off0001b6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6C6 5988 bytes
SHA-256: a34c62ddeb56fc4d713f75e31000c9c74cfafe73ab51f85e05f84a1e424eaae1
font_01_sfnt_off0001cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB0F 10768 bytes
SHA-256: 0b4834ef7e7672ea2d338fe6feb11e920a71abc4c4f34f36c8e5d55f6684d17d