Malicious PDF — malware analysis report

Static analysis result for SHA-256 94de7b715f596f0e…

MALICIOUS

PDF

67.9 KB Created: 2021-03-23 21:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 46224a220b25d509a308a708eb3daab2 SHA-1: b9172162d5974d1c847a5bb8a8d9bfc09d170be9 SHA-256: 94de7b715f596f0ee34f2bc94094fc3fba7823a4d94a9470a1baf894d9051239
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=how+to+set+homedics+scale PDF link annotation
    • http://tojuvapemupo.mywebcommunity.org/fusion_360_modeling_tutorial.pdfIn PDF document text
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/zomepexoto-punirobexobavo-zaxaforuzide-xuvip.pdfIn PDF document text
    • http://noksipals.online/stihl_034_av_priceqmdz5.pdfIn PDF document text
    • https://sojanonef.weebly.com/uploads/1/3/0/9/130969598/dotezit.pdfIn PDF document text
    • https://wuselusovofose.weebly.com/uploads/1/3/1/1/131164562/sepoled_gaxijedal.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/wixazuta.pdfIn PDF document text
    • http://lessonsonline.site/wasted_a_memoir_of_anorexia_and_bulimia_freejzmgx.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/nakarutaz.pdfIn PDF document text
    • http://itverys.space/xorib828dt.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/b690d6be-0e4a-403f-9b47-d43fbfbe85e8/xamaradag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05adde35-105d-4b73-b1d5-bd348c41a0b8/2411926303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0004270-007f-49b1-a180-7b29fcd3b30e/how_to_manually_start_orbit_sprinkler_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfe4cb7-c50a-47b9-8205-090caf4c35c3/1989_ford_f250_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/635a1269-58fa-4769-8e0d-70065ae0f9b1/pellon_interfacing_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf097b75-cd1e-4094-abfb-8bf1e310934c/the_atoms_family_song_lyrics.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/guideline_for_cervical_cancer_prevention_and_control_in_ethiopia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66eb1fe7-fc2e-4ad2-801b-3590a038aea4/what_country_has_fifty_shades_darker_on_netflix_2020.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_off0000cde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE0 5136 bytes
SHA-256: 0d938bedec3f2186ede5c40e8ade163c2e05b13382ec58872793c88fc1d2042e
font_01_sfnt_off0000df3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 10396 bytes
SHA-256: aa8da6c5867603fd3b5c3628360c2e64189a5a08d3100a6d9b846c5488e6369a

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