Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40654d2c7f4318d…

MALICIOUS

PDF

74.3 KB Created: 2021-02-26 14:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d837c8703e0090b3803c8d5f51734f53 SHA-1: 67afc7e6d97fbfd3dcd4110e3d60d965c60c3531 SHA-256: a40654d2c7f4318d460126768cb20dea06594fc67dac97241b83cf1ceec7d56f
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that redirect to known malicious infrastructure, indicating a phishing or scam lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded links and the nature of the URLs point towards a spearphishing attachment attack pattern designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=roblox+alone+in+a+dark+house+guide In PDF document text
    • http://options.expert/what_size_room_will_a_30000_btu_heater_heatuyzjk.pdfIn PDF document text
    • http://yoga-fitness.space/fafaxerazsufk0.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/eKr55Zc/muxitifokanuxulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_601ad420d8256.pdfIn PDF document text
    • http://inostrana.com/what_does_it_mean_application_in_review8oc15.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/d2ghnji/70882559337.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/fjcjijh/takurotumimuseputaxesedos.pdfIn PDF document text
    • http://goodnatural.space/34572625098x601g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460963/normal_60069d4e1b98c.pdfIn PDF document text
    • http://todayit.pro/wozulemidepomulasycqmb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_6012950919468.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/geiaHez/77994949176.pdfIn PDF document text
    • http://crysety.xyz/16406587666c6o1l.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/jcUjg3D/gizikoratinota.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/Riehcha/webukokapejafodejajezow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 5368 bytes
SHA-256: e63539f8864d09557a210176fbc304cf5b2e6254992a106512c011fa5ca935a0
font_01_sfnt_off0000fa20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 9900 bytes
SHA-256: b1143719a4f3da9286706571dde5c9def617e2d24e81972926c18fde12ed0b94

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