Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0851f0deff8cad7…

MALICIOUS

PDF

74.5 KB Created: 2021-04-05 05:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d319d10bffd8e03dd3de8808fa231746 SHA-1: 179dd659e48b534aa1d0e9531aa90d817880039d SHA-256: b0851f0deff8cad7a16bc4624e9fd8be95b91db09622bf72f51648b1de913cda
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://botokaw.ru/strik?utm_term=weber+grill+restaurant+hours PDF link annotation
    • http://wegansit.space/zmodo_camera_sound_not_workingncyl0.pdfIn PDF document text
    • https://vumuzuvi.weebly.com/uploads/1/3/4/5/134506571/niredanewe.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/mopun.pdfIn PDF document text
    • http://gachihyper.xyz/what_is_the_best_convection_oven_air_fryer5lall.pdfIn PDF document text
    • http://itactical.xyz/freeman_guerrilla_warfare_guide_2019okzoa.pdfIn PDF document text
    • http://svoylend.xyz/kiwekejekobexowbh.pdfIn PDF document text
    • http://zeropium.com/eu4_how_to_get_favors9suh4.pdfIn PDF document text
    • http://socialwave.me/44379401816dd3o0.pdfIn PDF document text
    • http://lg-supportteam.com/equipement_pour_rallye_de_rgularitc1nyt.pdfIn PDF document text
    • http://kkkirrreeee.space/vixagebp8zle.pdfIn PDF document text
    • http://cloudmarket.website/autumn_leaves_song1py8m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiniruru/maze_runner_death_cure_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59200e6-97a7-4a84-ba60-235f8a9c9d1c/how_to_reprogram_a_remote_start.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/festivals_of_pakistani_culture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7dcc00-ee5c-438c-b1b0-3b8f4d8728d2/19363272027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62569778-c935-47a1-8aed-6206fd2980b2/binudozidiwadolot.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/wudujutusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d4e2e71-ae88-4572-aa9b-15641368449d/fixefegojilumowolerutiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114cd985-dfc0-4718-b87a-cc1bbede9eb7/tajabuniridoxufijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20c38e6-9084-4f12-947d-bebcf217d0b3/98328999495.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/peg_memory_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7650a7e-492e-49c8-853f-87f8833ac266/sitaginumoferinotupeze.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_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 5100 bytes
SHA-256: 63945fb04fd951aa2783d7d787750e8c3ab38d21df4e49374e2df4795ceff031
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 11264 bytes
SHA-256: 8b825329144f9b786a474f91256f50c140dc41eebbb6e490259bc7269b7e8290

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