Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf91d6811dafe15…

MALICIOUS

PDF

75.7 KB Created: 2021-02-28 12:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8ebbb95bb5a7a4faa69585de48d8cc58 SHA-1: 25cd141b8a679d2cab0ac6f308e7722fe2514b1a SHA-256: 6bf91d6811dafe150e478e1dc7aefcb0578cdb07bf333f0dc5a17b51166cd7af
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/wix?keyword=ada+complete+guide+to+carb+counting PDF link annotation
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/061f3.pdfIn PDF document text
    • http://mybestchan.online/fe_exam_requirements_texasinp9e.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/53973437087.pdfIn PDF document text
    • http://alsamcctv.com/las_claves_de_la_argumentacion_anthony_weston_ensayo6s9la.pdfIn PDF document text
    • http://onsideball.info/how_to_find_the_measure_of_interior_angles_in_a_polygonekan0.pdfIn PDF document text
    • http://fbcopyright-center.com/wejinalidexl7cm.pdfIn PDF document text
    • http://trenolgia.buzz/addie_model_bookf8amj.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/822556.pdfIn PDF document text
    • http://ideal-it.fun/baptism_in_the_old_testamentkncj0.pdfIn PDF document text
    • https://sedonefuwetupo.weebly.com/uploads/1/3/4/6/134669082/4485984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_60054b684a400.pdfIn PDF document text
    • http://mmuuue.space/leather_templates_and_patternsow05z.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/56735708766.pdfIn PDF document text
    • http://svoydvalend.xyz/knife_master_vs_fruit_hite6j2s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458388/normal_5fe010820b0c0.pdfIn PDF document text
    • http://portkamesto.site/java_win_8._1_64_bittijqv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fukezavazuj/59971743559.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/pitalokenufidimisajo.pdfIn PDF document text
    • http://titugol.atwebpages.com/39502509991.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/analyse_2_smia_exercices_corrigs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 5228 bytes
SHA-256: 27a93dbf0d9f7efb170a986f142e031fdf31899e2152054c305c571d11ec2577
font_01_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 10312 bytes
SHA-256: 099d959b6df8301e279597618dcf9326dfabe54bf2d176e21e5b3081fe0688b9
font_02_sfnt_off0001137f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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