Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd224c673cad9751…

MALICIOUS

PDF

103.6 KB Created: 2021-04-02 15:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8150569d9ee8c041bf8d870d6a3583cf SHA-1: 6112b4c18f8b9db77f61f049936d1a415c733b20 SHA-256: fd224c673cad9751615c50b83a6e714039fb02cf318e57e67468d557407d6041
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. One of the primary URLs, 'https://lozipotod.ru/strik?utm_term=how+to+set+my+citizen+eco+drive+watch+e820', appears to be a lure for users searching for specific watch information, redirecting to potentially harmful content. No scripts were extracted, but the PDF structure itself is used to host and distribute these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://lozipotod.ru/strik?utm_term=how+to+set+my+citizen+eco+drive+watch+e820 PDF link annotation
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/Aihja3D/kiko_auctions_phone_number.pdfIn PDF document text
    • http://pedrons.space/wilupblnt4.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/igiwWia/bizukapezegipizamux.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/iggeig9/34583606699.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/feperuninarudakabovimofub.pdfIn PDF document text
    • https://cdn.sqhk.co/zokonerozo/Kdzigih/xezamotora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_603731fba5fbc.pdfIn PDF document text
    • http://wssummer.space/xifumejiberasirifowufifgrxzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_605f9a2a35c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_605684e829648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475847/normal_601fa75c26a0f.pdfIn PDF document text
    • https://cdn.sqhk.co/xinoxoxojib/hfApcmk/canine_neuro_exam_template.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/37d02225-65de-49ea-8d62-ab1b1b8e8801/club_car_precedent_parts_and_accessories.pdfIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_b4423e53fac04d6cac7d51a84c9c9dc9.pdf?index=trueIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_ba6907287f4c4f5c9973d9e1a3295e36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0800092-8e65-4c4d-ad88-b77d9e6b1ced/how_do_i_turn_off_auto_answer_on_panasonic.pdfIn PDF document text
    • https://b89c0965-50b5-483f-b67e-52f573158f4f.filesusr.com/ugd/1e222e_5f57bcc384d841738fb398794bb12853.pdf?index=trueIn PDF document text
    • http://mawokale.myartsonline.com/how_can_i_edit_file_free_software.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_f105067c35be4716b5d8a3f09bfcb78f.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 25264 bytes
SHA-256: 830d2e49f5d1d259d60d98522d8d9b6c005846d0eec49502e1b83f3609d160d9
font_01_sfnt_off00015494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15494 5880 bytes
SHA-256: f852ecc10b6cfd9e47c8ab31ec0c1b4daf2db735c67831baa7be3ced1bff96cb
font_02_sfnt_off0001688d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1688D 11180 bytes
SHA-256: 4e64722fe5848b390594c1a41fabe4169fad3cb946baca87d763da4477a5d5cd