Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1b5ea42c97d855…

MALICIOUS

PDF

79.9 KB Created: 2021-03-04 15:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b524a706ec65593f35619b04e603b13 SHA-1: 2dfba0f8a3eafd38d40e4ca5662685bc440f34b0 SHA-256: 1b1b5ea42c97d855b9b0ef81253610cd58df93f74caa8de3bc99031cafdc5942
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a product listing, likely intended to drive clicks to malicious URLs.

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://botokaw.ru/strik?utm_term=casio+baby-g+white+shock+resistant+watch+bg169r-7a PDF link annotation
    • http://futup.ru/66307665699ihw20.pdfIn PDF document text
    • https://tiletemilowa.weebly.com/uploads/1/3/2/7/132710791/28aaed1d.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/3ff716a.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/ijhb1gg/free_old_time_gospel_music_radio.pdfIn PDF document text
    • https://cdn.sqhk.co/rijolumexeb/PIjfhag/laws_of_the_game_soccer_goal_kick.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/jazoranifalisur_botasorodaraw.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/xokawimop.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/20f0d.pdfIn PDF document text
    • http://tradebot.space/alas_como_cuchillos3eg2x.pdfIn PDF document text
    • http://getcreditreport.info/sinuzajuo8px3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dexifuv.epizy.com/5380806687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56981e1e-1150-4079-b329-5959979a506b/xexoban.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_30af5a0942214747bc37798a81641639.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bfb109-d419-447f-8256-0e7ecce36162/58251604578.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_cfd97f4cd1dd44b88a80a4c678fe631b.pdf?index=trueIn PDF document text
    • http://malinaliwul.epizy.com/templateref_vs_viewcontainerref.pdfIn PDF document text
    • http://roduteberilexel.epizy.com/77946317864.pdfIn PDF document text
    • http://bikilut.epizy.com/29677895939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff5d4c0-0463-48ec-b7a4-8ff1f7b1ff13/jajijesupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf974372-a23b-4a71-b716-e4f01dd79fd4/49094162326.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_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 5808 bytes
SHA-256: 497d3f441ca069b6b4de687c080fea6ba4b7cf431e3906a15d8d5a19da0e31b3
font_01_sfnt_off00010df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 10596 bytes
SHA-256: 45d30243f269e021a2b621b1a154de6125ace32f22dc1280d05c66db87db5bee

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