Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5f5aa671b3438f…

MALICIOUS

PDF

70.5 KB Created: 2021-03-29 22:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: dacb16ff8b99dfa13acec613fd987d9c SHA-1: 80cfd2c517659ad463ffb87a14e94e3d6049a7b5 SHA-256: cc5f5aa671b3438fcc19018b4e399286f2c20410a91df2a5e8caaff349876575
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://mezovuduw.ru/award?keyword=actuadores+electricos+smc+pdf PDF link annotation
    • https://kalizijowu.weebly.com/uploads/1/3/4/7/134733304/kufekevemed-tulebazow.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/3Riajg1/breach_of_contract_termination_letter_template.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/farasowipaparasixabomoda.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/xitasujafup.pdfIn PDF document text
    • https://kufobuzu.weebly.com/uploads/1/3/5/3/135330794/1654934.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/eba979d5f.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/boolean_algebra_laws_download.pdfIn PDF document text
    • https://dirasikazeta.weebly.com/uploads/1/3/1/3/131379856/70b1b76809b5b.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/71094754748.pdfIn PDF document text
    • https://jofuwutiduf.weebly.com/uploads/1/3/4/7/134728528/xogarazavavat.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/dLghtre/reckless_racing_3_apk_free_download.pdfIn PDF document text
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/nekokufategimevijem.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/jirebonudur/a_simple_favor_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/fitufij.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/ijazat_video_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/21718299524.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/reduxixolibovuzegoxejigo.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/30380291329.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/can_you_put_a_blender_in_the_freezer.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/monthly_calendar_september_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/james_patterson_new_releases_november_2020.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/from_caterpillar_to_butterfly_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/contract_addendum_template_australia.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_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 5288 bytes
SHA-256: c64953cded418d371b43e0bb1e4bda7248ca96994f3bb8a3fc4b0c260df227a5
font_01_sfnt_off0000e694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE694 10880 bytes
SHA-256: 8a9b899b1dee18fcf17546181e9d0588a2db07b6fddd228bcd562d582ba06396

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