Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf47945cad3c3ca6…

MALICIOUS

PDF

78.8 KB Created: 2021-02-02 12:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: faabe1a4fae5788e4407247fefa125c9 SHA-1: b04414ccec073ad7ef67a071ef85f1c9f4474f46 SHA-256: bf47945cad3c3ca6068bef8bd1001d53107f37d2534d9e9672747faef5fef635
254 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document is designed to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise attacks. The presence of multiple external links, including one to a known redirector, indicates an attempt to lead the user to a malicious site for credential harvesting or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://yafferge.ru/aws?utm_term=cursed+texture+pack+mcpe In PDF document text
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5fe349e2c4c58.pdfIn PDF document text
    • https://najovukuno.weebly.com/uploads/1/3/1/4/131453374/510505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5fc59f5563d0c.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/jobawijofigob_lavegosetol_sukumefuravu.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/bovonewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467322/normal_5fdc027de3bf0.pdfIn PDF document text
    • http://lowazaz.22web.org/abaddon_dotabuff_guide.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/kujabes.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/xomepixo/swimming_pool_design_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/myriad_pro_google_font.pdfIn PDF document text
    • http://wavudipikudela.epizy.com/chapter_9_homework_answers_cpm.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/aashiqui_2_songs_in_tamil_video.pdfIn PDF document text
    • http://butadiviwev.rf.gd/xobawiwawufawikowuvano.pdfIn PDF document text
    • http://dujisuga.epizy.com/don_t_starve_guide_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/27716572572.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_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 5224 bytes
SHA-256: de321470db40c73e6ee83a2975b10a6a18929bb3d6ad0d578b63ebad2a05de9c
font_01_sfnt_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 11776 bytes
SHA-256: a769f8783e81ae4a685a6eaa566c26cac5e3865d5c2c0aa042c604244e75fe71
font_02_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 16132 bytes
SHA-256: 29a60492f44b39d68fa00197234d6df9a0cf581d74754725da64c153577ac146

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