Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd0772b77080342…

MALICIOUS

PDF

73.1 KB Created: 2021-05-03 03:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f26af2f42f4c4e9221ef8cac24dd6d10 SHA-1: 92e65f797e7a71e5a01ca3ba74920a4b7eeb5bba SHA-256: 6bd0772b77080342ca835e0103ada6c85be05e1bb8b703c588e3c71cdb1b9183
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=samsung+xpress+m2835dw+cartridge PDF link annotation
    • https://cdn.sqhk.co/fomolunuvufa/gfkidie/flyff_2019_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/f7Hgdii/8078471523.pdfIn PDF document text
    • http://waralolojogeta.sportsontheweb.net/66329980629.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/hhjhggh/cgp_ks2_maths_question_book_answers_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_6053da5abdff5.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/wjetIPI/burger_king_near_me_open_now.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/67998619738.pdfIn PDF document text
    • https://vitovoraf.weebly.com/uploads/1/3/1/1/131164311/3f69a792a7ef4c0.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/fujeli_mujowamuliwako_kipekivuvajazo_sejepitofodid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407302/normal_5ffd5633a5b13.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/jiwzh6L/woodworking_course_san_diego.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/zejupu-simonejevesojox-zefejub.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/lidufajekelapitide.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/linux_centos_basic_commands.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/870e30f8-c3e7-4ceb-a901-74d241b2d075/33055550281.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/stanley_jumpit_1000_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6522759c-2b5a-4d0c-9409-bfd4726fb9c4/bujaragisafajipibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974951d1-d1a5-4784-befd-f24f03a23179/23952257130.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_off0000da3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3E 6240 bytes
SHA-256: 54c63fffb22ba2dda8397734c8e1d4f1d0fcf1fa5d4440f138e3c97ce04da84c
font_01_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 12172 bytes
SHA-256: 3c4fb1ceedd5a0cb9e1d3072542cc1fdcb238b67535557fdda9d1e6fdb15bd21

Open this report in the interactive analyzer, or submit your own file for analysis.