Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2b010124886bfa…

MALICIOUS

PDF

82.5 KB Created: 2021-03-16 11:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8015779d09cdeddfbb4664e6327ce060 SHA-1: 7a8e99633faa28cf9e1ee68bc9bb1b63965b98d8 SHA-256: 5a2b010124886bfa0aa336ca689beb079d32c95cf5e41088971d9d64df7b4f4e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://pelibifir.ru/award?keyword=c%25C3%25A1ch+chuy%25E1%25BB%2583n+pdf+th%25C3%25A0nh+jpg, which likely serves as a lure to redirect users to other malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/award?keyword=c%25C3%25A1ch+chuy%25E1%25BB%2583n+pdf+th%25C3%25A0nh+jpg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414360/normal_602f094c4210c.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/jukitatojewivumilojuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_60232b8381067.pdfIn PDF document text
    • http://italia-doc.space/libro_para_leer_al_pato_donald_gratisucvov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5ff58bef4377a.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/romeo_and_juliet_comic_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_601b32071997f.pdfIn PDF document text
    • http://ogranicbio.space/how_old_to_be_able_to_work_at_rue21dtp3z.pdfIn PDF document text
    • http://rankingcoach-seo.com/serial_architect_4z53n8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dagajevefud.epizy.com/petajogokexomuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a39220f-6044-468d-bfce-db142c4cbd7e/96505931341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1b3f0f-17eb-4337-b038-3c821807c564/suruliladuzedulurupowaxew.pdfIn PDF document text
    • http://raviwazepoloxav.rf.gd/practical_machine_learning_a_new_look_at_anomaly_detection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ade168-b964-448f-9c00-9392c5ca4854/38647126243.pdfIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_8e0960fe77a04e9194a98bf2cacdeaf8.pdf?index=trueIn PDF document text
    • http://nuridoxiwe.rf.gd/xusixunefexifutajokubokur.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_7ccc1a94b0ed4b18a0a8d54f3518f0b9.pdf?index=trueIn PDF document text
    • http://tavawefojob.epizy.com/topographic_map_worksheet_answers.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_c5464b4274764cb5af33ffc27630e544.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4dfbc0-9fe1-4f58-a10d-295f8c809648/dadinoxijenukeluse.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_b26bef2f984a4ebbadf722d2abed8fb0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/883802a6-317a-4567-a13b-664f97499403/what_car_seats_are_compatible_with_baby_trend_sit_and_stand_stroller.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 5384 bytes
SHA-256: ae36355bad0d12500fd867e071d43688ec7f561652d11f25ca04d86b3d08f526
font_01_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 21512 bytes
SHA-256: 7f638a9972e46865214203f9d5a4e144ecf0a93bd4007c562e8280cf8a30494f
font_02_sfnt_off00012c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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