Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b556787365906e…

MALICIOUS

PDF

69.5 KB Created: 2021-03-07 05:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6703668ffba5e21194a6690da45d8ef3 SHA-1: 2906cf78352721bdc52e3d1917a97944bfb22dda SHA-256: f0b556787365906e95f36a3b82f174ea42e7e7bce3ad1ccb976bea0fe8a96d68
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 0.9993

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://botokaw.ru/123?utm_term=what+came+before+the+bible PDF link annotation
    • https://sejomuxajifaged.weebly.com/uploads/1/3/1/4/131437693/1310271.pdfIn PDF document text
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/nomikawepora_xarelibarubo_lijesi.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/how_to_make_a_vrchat_avatar_from_scratch_2020.pdfIn PDF document text
    • https://wexigovepabenu.weebly.com/uploads/1/3/0/7/130738565/nupufo_tadowakamej_sigur_likexevixekeg.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/4488001.pdfIn PDF document text
    • https://todulatewex.weebly.com/uploads/1/3/0/7/130738789/xobunumagodifonit.pdfIn PDF document text
    • https://wulaludotesi.weebly.com/uploads/1/3/0/9/130969185/8893005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_5ff6c7981ba40.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/0424ca11dcb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fecf2679a684.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/pebuzazox_dubupivokewix_selukigozarab_kokam.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/67682e2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_6023edff98919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_600cb29e9cf1f.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/xezofoxipewamuze.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
    • https://uploads.strikinglycdn.com/files/edbcad21-ba8b-4c01-8693-fdef34d0ac08/pafifogipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fde5173-0851-44af-bc66-0e0ef216bd75/vudipebikesewesute.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/i_am_not_perfect_but_i_am_limited_edition_meaning_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53ab993-d8fd-465f-b75c-f57bde2693ee/4507046153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b1fa49-5c7f-47cd-803b-6b71e1a8d38d/ponniyin_selvan_movie_first_look_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894d957f-9245-442c-8b1d-4f6a785dd589/7814656959.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/nascla_contractors_guide_tennessee.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/nazm_hikmet_ran_iirleri_indir.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/16148122907.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_off0000c95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95B 4776 bytes
SHA-256: d8fae269bb9e81a24b5935067038b7f50b55743408a34319f532eb19cf5673f7
font_01_sfnt_off0000d99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99D 9820 bytes
SHA-256: 3ecb2905b5f22d422020ca2c5b44a386690811fead95544c3a1f618821040333
font_02_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f