Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4b28f72572e1f7…

MALICIOUS

PDF

75.2 KB Created: 2021-03-29 00:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 603c4d8821fbe5ebe22461306c68e764 SHA-1: c0a8cc0d0fd2f8b76557677eaeaaf020ad361ffd SHA-256: 3f4b28f72572e1f7adba64589b594af12bf22e0824bcb7a2694eac4b19b8edd0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable or associated with link farms. This behavior is indicative of SEO manipulation or a distribution mechanism for further malicious content. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest an attempt to redirect users to potentially harmful sites, aligning with phishing or malware distribution tactics.

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
  • 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://xezojetit.ru/award?keyword=balanopostitis+en+animales+pdf PDF link annotation
    • http://nasty666.space/2006_honda_odyssey_ex-l_transmissionthmb2.pdfIn PDF document text
    • https://polalakenasi.weebly.com/uploads/1/3/0/8/130813885/zenalozi.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/mapiwijek-tazuwezirezulu-rafixika.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/1119457.pdfIn PDF document text
    • http://hookup682.site/how_do_you_tell_if_marbles_are_valuablegqksc.pdfIn PDF document text
    • http://fakaripeti.xyz/208404420cnqjs.pdfIn PDF document text
    • https://nolabuxovitu.weebly.com/uploads/1/3/5/3/135305824/runod-zufobobutozas.pdfIn PDF document text
    • http://svoytrylend.xyz/koxeribodizvuj3f.pdfIn PDF document text
    • http://mybiol.site/best_free_call_blocker_app_for_android_2020dlf46.pdfIn PDF document text
    • https://xuzonikafu.weebly.com/uploads/1/3/5/3/135351414/5afe69.pdfIn PDF document text
    • https://patekakedosejot.weebly.com/uploads/1/3/4/4/134479085/punerumorejesenel.pdfIn PDF document text
    • http://xteenware.online/windows_on_the_world_complete_wine_course_updated_edition_20164u6y5.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/943ff047e06.pdfIn PDF document text
    • http://profit-makers.club/potakideukq62.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/40a83c3b060.pdfIn PDF document text
    • http://bionatur.space/octopus_watch_alternativeav82v.pdfIn PDF document text
    • http://naturaitalia.space/jabida70smr.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/wunudovazasaxu.pdfIn PDF document text
    • http://beautysale.site/how_to_put_film_in_nikon_fgvaye5.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/nowonovege/black_anodized_aluminium_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/cheshire_police_firearms_variation_form.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_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 5140 bytes
SHA-256: 346576e11f22bb0f9ad38299de4b7cd6e70c8d57cd8ba232cf4f0e910d72c7ff
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 11092 bytes
SHA-256: 33dd0c3af52d385ada19f39f5364613b142bf197f1a896203114b40f4b3a6e4a

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