Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2a9be8ff73b9ba…

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 17:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2ba7aae7d2c8cd4d53dd8e2e830ed983 SHA-1: bdb7abcb989866b3a99049c6965a6cc120b5e55a SHA-256: 6c2a9be8ff73b9ba862df50d0c606bf943ef77a883da870197a18df6405ba026
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=sennheiser+ew+100+g4+835+sa PDF link annotation
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/retukolel-zamexilixufera-nakedenem-xipoveb.pdfIn PDF document text
    • http://all-system7.xyz/7.3_powerstroke_service_manuals8owv.pdfIn PDF document text
    • http://nudistoff.club/mandalas_coloreadas_para_imprimirq8tsc.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/6d06cb7c.pdfIn PDF document text
    • http://ecoservice-vlad.ru/59836338532szkn1.pdfIn PDF document text
    • http://litesunaju.iblogger.org/english_grammar_in_use_supplementary_exercises_with_answers_2020.pdfIn PDF document text
    • http://silver35.ru/how_to_test_ecu_pinsypa51.pdfIn PDF document text
    • http://cetop.xyz/raxenutetiboposijorerobsoto2.pdfIn PDF document text
    • http://checkmyscore.info/amplificador_sony_xplod_1200w_caracteristicas2z5et.pdfIn PDF document text
    • http://pixelbarista.com/misobemuvbbkx8.pdfIn PDF document text
    • http://palitra-cveta.ru/multiplication_worksheets_for_grade_2_with_picturesin456.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/sififusanuvini-zanazip.pdfIn PDF document text
    • http://chambre.xyz/48_laws_of_power_best_friendfmznd.pdfIn PDF document text
    • http://zelopaqq.xyz/supokuruxebinokamarso9kd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_ea7ea05d471545988bcfdccaf18e3d30.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_2a9938bc98294bb0bfaa40d3953185ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2439d9-fef7-4c42-93ee-061553ae98d1/nokadovo.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_b4ebd71827414adb8bb4432209674029.pdf?index=trueIn PDF document text
    • http://mufizepumu.rf.gd/trumpet_solo_pieces.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4506bd-5c53-4deb-86af-0b4c860069d9/2005_ford_f250_bed_patch_panels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bd0d79-225a-4666-bb3a-57e6b14a34a2/wixubatabafofav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4a979b-b725-4a40-9c47-8ed2d579c592/best_madden_20_playbooks_for_sim.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_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 5876 bytes
SHA-256: 30bccfb2816ac1b0d2d570478c1fe57d9de1c13ceac059ae1bf67826cf8d9b0a
font_01_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 11680 bytes
SHA-256: 93829f7cbf30e3d858956c5d670244e1ba91c33b81161a32e05add7cd62c643f