Malicious PDF — malware analysis report

Static analysis result for SHA-256 d263ed5bc248cbac…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 18:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c2bcfefe3a7c7223b28f408e1141dd2 SHA-1: 980a0a4d34cc1490ce68fc4bda1099af39e0e70c SHA-256: d263ed5bc248cbac6836094e580ffce9d58a179a1d0428173e3112b29f0f7a04
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting an attempt to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=400m+to+miles+on+treadmill
    • https://sokifaxus.weebly.com/uploads/1/3/4/6/134666683/7321248.pdf
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/deselijepa.pdf
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5fe63ef982719.pdf
    • https://cdn.sqhk.co/vapelomusanu/UFpV2gh/water_park_slides_for_home.pdf
    • https://mapunexi.weebly.com/uploads/1/3/3/9/133999872/sejemazokon_fafoz_ripavovene.pdf
    • https://wasexakenisopi.weebly.com/uploads/1/3/5/9/135982815/896bfb9e.pdf
    • https://cdn-cms.f-static.net/uploads/4499651/normal_602c04f639e7f.pdf
    • https://cdn.sqhk.co/basinasedu/ghPJijx/i_am_death_incarnate_rage_2.pdf
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/faf865db1d9.pdf
    • https://static.s123-cdn-static.com/uploads/4392872/normal_5fe4f8d2de673.pdf
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/d7836.pdf
    • https://static.s123-cdn-static.com/uploads/4466411/normal_5ffc18ceb7826.pdf
    • https://static.s123-cdn-static.com/uploads/4487663/normal_5fc79bf85f420.pdf
    • https://cdn-cms.f-static.net/uploads/4387037/normal_60188560b1b7f.pdf
    • https://rovetizewi.weebly.com/uploads/1/3/0/7/130776299/nunubamaf.pdf
    • https://cdn-cms.f-static.net/uploads/4454545/normal_6045ef2e0a0b6.pdf
    • https://cdn.sqhk.co/tobamozusaj/zqienhj/hollow_ball_bearings.pdf
    • https://cdn.sqhk.co/nugutobudan/ieFjhOB/70419927248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_d8726f46ce3548aa8525a4ba8a37d3d0.pdf?index=true
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_ff4b0100643c465086ea108df0ef4566.pdf?index=true
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_f370620c7f0c4f8e8fb99906e3bc6178.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010541.bin
534587c8a8f4bfef611917464b293650a4beee252a0a67374edfdb595593436e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 5104 bytes
font_01_sfnt_off00011680.bin
faca9738d46aa14637c65b3911aea2cc10d114ab9d59ddafb58fcd8b7ae474ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11680 11452 bytes

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