Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc0079160d3bbcf…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 20:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2837e272a1967aefceaa82497662adee SHA-1: 5ca68edd4bcdc96870434f21d92bf7bd038a3337 SHA-256: 3dc0079160d3bbcf58e820b6cb6cb1ef72eb1160f710de4e353f41be5a29db29
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The PDF also exhibits characteristics of a link farm on disposable hosting, further suggesting malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=sheet+metal+forming+basics+pdf PDF link annotation
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/ea0bb1.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/lamuxosew_muwevojedefasog_toferagusuvax_xitibe.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/b8b80c73d221.pdfIn PDF document text
    • http://vexezujuzas.scienceontheweb.net/basic_english_grammar_for_bank_exams.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/que_es_la_administracion_hotelera.pdfIn PDF document text
    • https://zomuguzilax.weebly.com/uploads/1/3/5/3/135327960/jozomusi.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/50_soruda_antropoloji.pdfIn PDF document text
    • http://xenogejewaruvi.22web.org/lord_byron_love_poems.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/tikofaketonub/88787269438.pdfIn PDF document text
    • http://zujisofivo.onlinewebshop.net/root_chakra_meditation.pdfIn PDF document text
    • http://bedegotix.epizy.com/avon_catalogue_march_2019.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/dovogefoditabidorisakinaj.pdfIn PDF document text
    • http://sufizaj.rf.gd/adobe_indesign_free_utorrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb729b32-904c-4c1a-aa65-ed5e734f5ae5/88798555756.pdfIn PDF document text
    • http://wosazexawejusu.rf.gd/my_boyfriend_yelled_at_me_yahoo_answers.pdfIn PDF document text
    • http://dogurozisi.rf.gd/beginner_s_guide_to_solidworks_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/jukepewofuwadajugodo.pdfIn PDF document text
    • http://vaxesopubowutuf.rf.gd/4457237544.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/ridekoloxej.pdfIn PDF document text
    • http://birotizedu.epizy.com/425176359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a013244b-243d-405c-ac07-0ff91a662768/vimufiguwumovul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368a3edb-5877-42b4-8692-cadd7a0fd11d/75976985402.pdfIn PDF document text
    • http://dotopaku.atwebpages.com/english_words_list.pdfIn PDF document text
    • http://kifemulawej.epizy.com/ccna_module_2_chapter_8_answers.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_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 5812 bytes
SHA-256: f80f44d19faa23c764f0486ce546fcccaec184b7db78c67a96cd7fcd33c79643
font_01_sfnt_off00011149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11149 10300 bytes
SHA-256: ce09413e53be4ea63ae6e5c31715bddff43c8200cbe4429bdd60e8d6a118f196

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