Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34abea896a8de41…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 19:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 182ff014c09e6dfcccafcf686a036cd1 SHA-1: 9f74ba83c9c93d81411031bc47b6b7266d2da1d1 SHA-256: d34abea896a8de41367d610b315f74d18fe3368512ab84b531b0f7de8a4e2204
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to various domains, some of which are associated with disposable hosting, further supporting a malicious purpose.

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://maypoin.ru/strik?utm_term=peavey+classic+50+tubes+replacement PDF link annotation
    • https://cdn.sqhk.co/purorelaz/cjchghc/ixl_math_6th_grade_sign_in.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/maytag_3000_series_washer_drain_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/WjXHsig/1386105483.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/binusinuxedej.pdfIn PDF document text
    • https://bebujufexuxiki.weebly.com/uploads/1/3/4/6/134624407/fe0f1c35.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/ihjaifM/dojulog.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/a246fa.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/gzgdge0/nuvilegakokivigof.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/e3sMjjN/mucho_party_mod.pdfIn PDF document text
    • http://depusapo.mypressonline.com/best_anatomy_books_for_physiotherapy_students.pdfIn PDF document text
    • https://xifofenanupov.weebly.com/uploads/1/3/4/8/134857182/9057557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujuvisesakok.myartsonline.com/57536870126.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/wotus.pdfIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_d6369678e78e48398e91f585e18f3cd6.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_414cb6e89773489dacc0aff55fb160df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba33136-0b5c-4f6b-9ef6-9ea31e613897/juvolaxatokofirutuxezi.pdfIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_175410cb57824551922759ecc297e4d9.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_d4ba0c9cfc5e4b8da964a139a6f33e86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/sosibetogopojalogugux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d420bf85-60b6-478e-bd86-0e487ae278bd/72019159318.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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 5648 bytes
SHA-256: 46c31f83d75bcca82573f7f3343d8fc0b0c72e5dc4d5588f81db167051e0f506
font_01_sfnt_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 10912 bytes
SHA-256: 3c84cf543f94d17d83fbe3d32ae69a02ce1c72eb400a04e2ef90c1099b693383

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