Malicious PDF — malware analysis report

Static analysis result for SHA-256 be962e2794a37240…

MALICIOUS

PDF

80.4 KB Created: 2021-04-02 04:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ad8d21a79c9f503a6836b9e43681ccfb SHA-1: bd55258719fd36fb9446f79b592aed90d128c5f2 SHA-256: be962e2794a372409bd2e0622abc04cfeccc9abb151853339fefac1a1b616bff
186 Risk Score

Malware Insights

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

This PDF file contains a significant number of external links, flagged as a link farm for SEO purposes. The primary URL, https://xezojetit.ru/award?keyword=assembler+pages+pdf+mac, suggests a lure related to PDF content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=assembler+pages+pdf+mac PDF link annotation
    • http://koponegigat.medianewsonline.com/lalek.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/what_is_the_role_of_systems_engineer_in_infosys.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/kumasala/vikugaxezavarokavut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d736a01b-bee3-488d-bda5-2e075ab31853/briggs_and_stratton_heavy_duty_4_stroke_engine_oil_msds.pdfIn PDF document text
    • http://xivegujox.epizy.com/rikopozobufiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/best_devotions_for_dating_couples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076e075b-8931-48ad-8caf-ad31338048a1/35751662024.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/73813958587.pdfIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_379c03274df1423585588a0a83333ff7.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_96d7804cc41945d697aec0e64f312c9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cc90df-abee-4e7e-93c0-498492b58e18/73343543946.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/46422882625.pdfIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_e7fcc6350bfc4a0aba369e5c82d6e93c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f109b1e0-aae3-4e4b-a4ac-fb88a6769448/hp_laserjet_1320_printer_driver_for_windows_8_64_bit.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_c2e1ba854ae34cefba71067b5c3d88fc.pdf?index=trueIn PDF document text
    • http://gipanitefoj.epizy.com/15820538919.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_64263736f9a04400bae3da02838fa4e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b22389b-6836-46fa-b01d-0958b9ede287/99_names_of_allah_qtv_video_download.pdfIn PDF document text
    • https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_38fd54784c8448b0b4337e5247548f0f.pdf?index=trueIn 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
    • 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_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 5604 bytes
SHA-256: 3006668084a0b9e0b8000ded870cc6d123867683a69fd37506d2fd51bcf207cc
font_01_sfnt_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 12676 bytes
SHA-256: 6a010a366ad8f989d6d8d53263f32cb6309b5bd2962bd531c67de265d4b841af
font_02_sfnt_off00011ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 16388 bytes
SHA-256: 534e44c921e8acb9c8e993207df297c85ca6c672af4c6174c05b3ca24a170572