Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4c9be63979726d…

MALICIOUS

PDF

73.7 KB Created: 2021-02-26 08:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fa3362853e57cf6ac504f6a0edfd3161 SHA-1: 1e799b59fa2ae109408324b7dd4c2ad4fe7c58f0 SHA-256: ed4c9be63979726db2404138dfa36ced7388cc7fd1fba2a2a7b2a0cde3ff1afe
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=bass+pod+xt+live+manual PDF link annotation
    • https://cdn.sqhk.co/xedaberetaj/cbtPq9e/87738971106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450635/normal_5fd87c2dc5f7b.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/gcigSge/miviborupalawa.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/ihTijjc/talking_tom_cat_2_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_600ab20721b78.pdfIn PDF document text
    • http://ufenmac.com/jajulinodujow7pww2.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/hdUZVgd/varosovov.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/4029067.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/ifjbgh4/40395974479.pdfIn PDF document text
    • http://naturalgood.space/old_betty_crocker_cookbook_lasagna_recipezntp6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fd91fc2df58c.pdfIn PDF document text
    • http://prizinsta365.online/snakes_on_a_plane_castn7unh.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/UiisTNf/escape_logan_estate_walkthrough_chapter_1_act_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495055/normal_5fee823ba0eca.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/gcd6hb3/womovubuvozumunuxuwutut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bideliv.rf.gd/odia_song_video_dj_2018.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_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5188 bytes
SHA-256: 07003e247bb189d1e1674609169df448ae6669963f039a858c42a4f89c8eb8f9
font_01_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 10984 bytes
SHA-256: 185cdf2d66debb741540ea3bd013b710cdaa00be88eface262c62dd4da3576bc

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