Malicious PDF — malware analysis report

Static analysis result for SHA-256 6969adf7e3c64429…

MALICIOUS

PDF

86.4 KB Created: 2021-10-06 10:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f715c229ad5c2954e745d0ac2a1f45b8 SHA-1: ad65c8533c3ce0a0e79aef4cdca444fc4b048ad7 SHA-256: 6969adf7e3c6442957b48c10d60f4b316fce0ddf658f7a8106f5cefbe1db3695
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to a link farm, suggesting a tactic to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://boxshop.mn/userfiles/files/nofevegasilasa.pdf In PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/toravozivepimu.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/44656154089.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/21484960337.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/64412662246.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/juvupinoremevezebitu.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1614db36eedb60---vijitusefeveganuzokasaj.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/mofisinefi.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/76693666977.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/rumoxunajavenawisarebenuj.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/93194130320.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/guverimexotetofis.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/9776968698.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/36037320671.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/93482783754.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/rabavagelagojirud.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/mufosemusenevud.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/93249100676.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/22521590116.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/8431927111.pdfIn PDF document text
    • http://ausafe.net/images/art/files/47103709290.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13256807474.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/94860570627.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=apple+lightning+cable+pinoutPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 19788 bytes
SHA-256: 1da7fbc1718f69b0727c7d2a0a81e34252acc7739a29be49f2324bc657dcc091
font_02_sfnt_off00013292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13292 10608 bytes
SHA-256: ee60cf7138753652640718ba2a4c262326b4fbb53c1a6f32382d6af3513a64a9