Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcf088d64ebc9e3…

MALICIOUS

PDF

75.0 KB Created: 2021-04-11 04:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c4850b5bd4a39a5793bc06ea96ad9cd SHA-1: 3a10bff22d8e6e2786ec4f2b023fb7a470c67566 SHA-256: edcf088d64ebc9e3c0d859abc7992cf58b3b941f7e3b50fffda1c28c7ea16182
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://baarspo.ru/strik?utm_term=what%2527s+the+coldest+city+in+canada
    • http://sozapemogoz.mygamesonline.org/wozig.pdf
    • http://xezifimo.iblogger.org/vokepak.pdf
    • http://wumomotetidofe.getenjoyment.net/libro_fisica_cbc_uba.pdf
    • http://tamogulaganero.scienceontheweb.net/ps_vita_x_2019_release_date.pdf
    • http://sugalomiwuto.getenjoyment.net/axis_bank_my_zone_credit_card_application_form.pdf
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdf
    • https://static.s123-cdn-static.com/uploads/4475194/normal_60048bf550d19.pdf
    • http://figimumagoko.mygamesonline.org/amazing_grace_violin_music_sheet.pdf
    • http://junumidutuzakox.getenjoyment.net/n1_maths_book.pdf
    • https://badikodaxalele.weebly.com/uploads/1/3/4/6/134698448/zujitino-fikina-gibob-vipewupo.pdf
    • https://besekexedonake.weebly.com/uploads/1/3/2/7/132741764/6135514.pdf
    • https://cdn-cms.f-static.net/uploads/4375528/normal_60271fcab288d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://womawujun.atwebpages.com/biology_dictionary_english_to_urdu.pdf
    • http://bavufupuvamopaf.atwebpages.com/the_tough_kid_book_practical_classroom_management_strategies.pdf
    • http://jotizepexul.epizy.com/56602211909.pdf
    • http://jowawaba.atwebpages.com/nicolas_boileau_l_art_potique.pdf
    • http://zigadewat.epizy.com/widavabaxorixojofepuli.pdf
    • http://pevuzimoba.rf.gd/example_of_persuasive_writing.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e754.bin
8d85d8c6290ae7a850841e9ac4ce9d03df6dc96c90a70cc4b2debefd4582e5c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 5080 bytes
font_01_sfnt_off0000f8b3.bin
6c7fd4def077c71eca4c2bb8880b75eeec259f11902ede505febf045c8c32be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 11320 bytes

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