Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c54f424029e766…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 22:51:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 308436fd4a1a3019ff98b47b1f36baaf SHA-1: fb36370f8aa67141dc972c3bed4cf940e0b59d50 SHA-256: 59c54f424029e76652991ed063ca676aa52a1cb13b265c198be63f2b97894974
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors, indicating a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is used to host the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://dafemum.ru/123?utm_term=wallpaper+anime+1080+x+1920 In PDF document text
    • https://cdn.sqhk.co/xajamenujo/eges0ja/idle_tanks_3d.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/xigowuporapizo_xasizopaw_kivuwore.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/nm0ghgi/garmin_heart_rate_monitor_chest_strap_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/gcMrhcw/zezuras.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/dBFAM7D/wizijele.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/hhigijh/cfitrainer_questions_and_answers.pdfIn PDF document text
    • https://wodosokereso.weebly.com/uploads/1/3/1/4/131407547/44af3ffeb52fc.pdfIn PDF document text
    • https://fataleripe.weebly.com/uploads/1/3/0/9/130969718/tekumijaxaruma.pdfIn PDF document text
    • https://vumiwexazowonig.weebly.com/uploads/1/3/4/6/134680765/wigimif.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/6Ojc3ih/33962326691.pdfIn PDF document text
    • https://volamajujidek.weebly.com/uploads/1/3/4/6/134667755/a9ab001bd8f1.pdfIn PDF document text
    • https://cdn.sqhk.co/lewovazu/C7jdihH/besexazefaraxalam.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/j4jjgg2/tesco_fold_up_picnic_table_and_chairs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwipofel.epizy.com/arangetra_velai_movie_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4d3e97-a0ea-4eaf-8c09-01f04cc12ce0/94985891128.pdfIn PDF document text
    • http://lonozixugixapap.epizy.com/north_carolina_civics_and_economics_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04f8386-dd81-4f9d-8819-9e76f65b8aff/how_to_start_troy_bilt_storm_2410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3139832-4e22-49e6-b503-cfee26740a2f/trane_cleaneffects_reviews.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/91204853912.pdfIn PDF document text
    • http://zukufefomuzaz.epizy.com/10864605449.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_off0000d304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD304 5544 bytes
SHA-256: 13f529e5335410801d1510094e25dfa6624b0a4452f1edc81076b5556871669d
font_01_sfnt_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 11392 bytes
SHA-256: acbba09612359acd8e6493041ceb712df0b2dcbf41e3aac7340f65c2b49f19f9
font_02_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 16320 bytes
SHA-256: f4254604754990e2a095cfc3e46878dca09ce274cbe23d8fcd6388939f9c9446