Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5588f73ce8f992a…

MALICIOUS

PDF

88.3 KB Created: 2021-01-20 18:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7ec1a330f4e58c2619fea74bb8730fec SHA-1: af20cf4e71e0044238dbb76a61032b1c68635c88 SHA-256: c5588f73ce8f992aadcb32b2ff7363327981b56c5e3402436c22866954fb74f9
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for a malicious redirector link to 'traffmen.ru'. ML classification also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the critical redirector alert suggest the document's purpose is to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffmen.ru/123?utm_term=kawasaki+concours+14+specs In PDF document text
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/4246269.pdfIn PDF document text
    • http://jufidozotazi.66ghz.com/tegavexu.pdfIn PDF document text
    • http://vutanari.22web.org/89668309369.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/iaupiaQ/85182998454.pdfIn PDF document text
    • https://jeruxonoja.weebly.com/uploads/1/3/1/4/131407493/dezidevijadob_kamimatipeta.pdfIn PDF document text
    • https://site-1172118.mozfiles.com/files/1172118/acronis_backup_advanced_12__5_manual.pdfIn PDF document text
    • https://site-1204089.mozfiles.com/files/1204089/89509082480.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/heFhdsq/43849527630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487631/normal_5fbce69db3b42.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/87a91969d39ba4.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/50_50_partnership_agreement_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452850/normal_5ff0054215950.pdfIn PDF document text
    • https://site-1173140.mozfiles.com/files/1173140/duty_roster_format_for_security_guard.pdfIn PDF document text
    • http://timogefubor.22web.org/worksheet_graphing_quadratic_functions.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/ghiKUGx/bapir.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/kjihbic/wojovavagedo.pdfIn PDF document text
    • https://xatoxelal.weebly.com/uploads/1/3/1/4/131482937/dajuxosatozubit.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/vexosafugunu/65693205446.pdfIn PDF document text
    • http://liwubujuwu.epizy.com/sevimuduvumubiwukimebo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/fenokorobosositetibizu.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/anti_cheat_pubg.pdfIn PDF document text
    • http://josetevuj.epizy.com/s._p._c._a_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/bengali_movie_annadata_full_movie_free.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_off00010455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 5160 bytes
SHA-256: 8a7f9b3b48da1ba4d7b560bdfc37d728cae7853fcdd83c80cf306e3b0c068746
font_01_sfnt_off00011614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 11688 bytes
SHA-256: 4238956ca0bdc4ae06ee6f1a3df238c0198c1b81fb27996ee7de6e98f886083c
font_02_sfnt_off00013e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E51 16088 bytes
SHA-256: 9900a2061f4db6d5851a1fb623229e1c91a1f2215fec638d1e55d9f0c32ecb7f

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