Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd84e5215dfb2a9d…

MALICIOUS

PDF

79.3 KB Created: 2020-12-29 14:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: db7c91970b6750c85c37aecd76ed1c51 SHA-1: 26226e14697c8f2f7d57022411d5e9c9c9ed3e1e SHA-256: dd84e5215dfb2a9ddfb94cef0ea4307c5845377704a7a698a7e43a6bad8413d7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting it's part of a link farm designed to drive traffic to potentially malicious sites. The document body, though heavily obfuscated, appears to reference property tax rates, a common lure for phishing or SEO spam.

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://traffset.ru/123?utm_term=orange+county+property+tax+rates+by+city PDF link annotation
    • https://cdn.sqhk.co/fetadupozo/icyIies/vinopukog.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/96ddaf857b5.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/4363cdb4.pdfIn PDF document text
    • https://suvosimi.weebly.com/uploads/1/3/4/6/134688706/bipafudabeli-soranibi-femeno.pdfIn PDF document text
    • https://lodobimamavudug.weebly.com/uploads/1/3/4/3/134306091/vomanopujuwolaf-dezeje-wuvule.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/1220846.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/151d9783-e37f-44ea-a2e8-b04aa3ed68f6/1010_animals_block_puzzle_game_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89883491-5625-41a1-86e3-80d662099e6b/is_salt_a_renewable_or_nonrenewable_resource.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4aeabd7-63db-4377-8b38-712532d8cf78/levijaxum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20241efd-518e-4c98-8248-d0c9a1d0dc8c/reviving_ophelia_play.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/firemotoloposaxipobumew.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/jorozetexugejob.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/bowflex_revolution_video_workouts_for_women.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbda0052-82c2-47ed-95e4-43d5ff7a6b3a/28860883762.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_off0000f8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B0 5404 bytes
SHA-256: 5040859b2eab1e7f29697e1f2f0992c28df10ed7b77dedfe51262375e5e25baa
font_01_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 10900 bytes
SHA-256: 92616de31ab3de76151592398cc13c68310b7a3853f9470050481c33e1bdfe51

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