Malicious PDF — malware analysis report

Static analysis result for SHA-256 29eb66f169eaeea1…

MALICIOUS

PDF

78.9 KB Created: 2021-04-02 20:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a56887423cb0d0ee7d981316bd3ca1c4 SHA-1: 753da6dffdb06a450783e15293fb9697a809d528 SHA-256: 29eb66f169eaeea1318ce97e6f1e1720eb7728bf7a968d89467aa94f53d5b926
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=apple+time+machine+backup+only PDF link annotation
    • https://cdn.sqhk.co/zejejofe/hct5Pic/best_birthday_cake_decorations.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/Svo6ghh/naxofajifatizinadasub.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • https://cdn.sqhk.co/piwuzuberaze/3jiiejh/uber_request_a_ride_without_app.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/Mjdjbgj/best_action_hollywood_movies_2018_list.pdfIn PDF document text
    • http://gebikatafexanu.22web.org/revisiting_the_eclectic_paradigm.pdfIn PDF document text
    • https://mesifadenox.weebly.com/uploads/1/3/4/1/134108947/siwoto.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulelenuvi/gih6Csg/video_er_extension_chrome.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/xemapotozizezonufok.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/7clhfrh/bubble_boy_costume.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/2075338.pdfIn PDF document text
    • https://fubudebuz.weebly.com/uploads/1/3/2/7/132712336/4f4e2f0d08962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_e5a5f05262c84971966f1733c297b4dd.pdf?index=trueIn PDF document text
    • http://ludilisi.epizy.com/mlp_cheese_sandwich_color_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/65195461831.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/xedikefadife.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/48975945002.pdfIn PDF document text
    • http://xibubew.epizy.com/nudovapemuziko.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_304fb34d73c64ccbaf381b8dde341755.pdf?index=trueIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_9b0623f20d8549cc9b65ddd9aaf7f8b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/60094129346.pdfIn PDF document text
    • http://vanowawupusizi.rf.gd/62488134163.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_eae5b16c35044961b7a317cfd8028408.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/simple_python_projects_for_practice.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_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 5192 bytes
SHA-256: dd70163c312414121a9439abcc4d11e8e5e1c9a355c1c7e295dd4311069f5ab9
font_01_sfnt_off000108d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 10832 bytes
SHA-256: ddc2b2a19adb6eed869ae383377f901dac91d346ca27a07e21e8e95a9b121eac