Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d25d397b3a4adf…

MALICIOUS

PDF

73.4 KB Created: 2021-06-12 10:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd7b6fe29473d4bbbadf190ae29e340e SHA-1: 1d894222aefc255da4f0bbde229a5b9f120fca0c SHA-256: e8d25d397b3a4adff9c223880eed1ee53896dc95d5e9c4556e617f236829f432
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 0.9997

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://pistant.ru/pbw?utm_term=rom+de+3ds PDF link annotation
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/e8cc995531153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_60215d550a9ec.pdfIn PDF document text
    • https://zenuxemevobimog.weebly.com/uploads/1/3/4/7/134756414/sajifanil-zinuretiwokule.pdfIn PDF document text
    • https://xolawawasaxigu.weebly.com/uploads/1/3/4/5/134587427/pijagagiwese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_5fd627aeef819.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/31f94a.pdfIn PDF document text
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/9432242.pdfIn PDF document text
    • https://fibexijenoka.weebly.com/uploads/1/3/2/6/132680926/mevewewana_juwaxas.pdfIn PDF document text
    • https://tigewatujuw.weebly.com/uploads/1/3/0/7/130738543/zagesufiz.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/tuvusapew_vokawisan_bobajekajulis.pdfIn PDF document text
    • https://rosajojuzexoked.weebly.com/uploads/1/3/0/8/130874599/0db7c.pdfIn PDF document text
    • https://fogepozejasa.weebly.com/uploads/1/3/4/4/134454633/2e6de.pdfIn PDF document text
    • https://dujajiworexu.weebly.com/uploads/1/3/4/8/134848881/tenixefabe.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/dubulifoxofapelusug.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/d18cf0c4-0fe9-4a52-8b29-698455ed2343/62543001664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8b423a-d1e0-400c-874c-74387e26b53d/tasufedudinenuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e70472e-4121-43b0-b759-ad390bb4b8a1/mujhse_dosti_karoge_full_movie_sub_indo_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1f50a2-e318-4ebc-af4a-cd4258bfae45/who_has_the_most_clean_sheets_in_premier_league_18_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79dc890-2ab6-4f9a-a82d-359bb7bf7812/63235314101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2725bed-9960-4425-aa47-de985278178f/how_to_program_autostart_prostart_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4bd8b8-564b-40b6-86b8-371d013ff09d/80517840514.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_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 4804 bytes
SHA-256: 997b5db76c45867e90d19af2474a4eadc6461b1fc2f693bfabcf2b13512693c9
font_01_sfnt_off0000f1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B5 11840 bytes
SHA-256: b4ad401d8be5cdfd46f9b54bb2db6eb53bd8508a39f3f6891857d34485840dc5