Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fabc053e7d1f59d…

MALICIOUS

PDF

74.3 KB Created: 2021-04-08 00:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7f070358ed2fc0c8cfc2f6a8dc7ab616 SHA-1: 56ef88bcd249ab4f3bf128ded7213b2990c99a08 SHA-256: 3fabc053e7d1f59dffee502a31e10cc51e72c32d1bac953f3796b03c60693dd5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain that appears to be part of a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+do+i+clear+the+code+on+my+onan+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381318/normal_601d927dbf3b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_6059e42513466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487623/normal_5fcc4156713fe.pdfIn PDF document text
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/5095595.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/convert_to_word_ocr_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/iiEGhaf/52633766100.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/cDgijcW/clouds_movie_review_plugged_in.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/dNjddhe/sitka_blacktail_archery_hunt.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/20672761967.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/8496118979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_604655aa8f725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5feb326006aae.pdfIn PDF document text
    • https://sewatebemadog.weebly.com/uploads/1/3/1/1/131164437/2188146.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/7839425.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/dofajekuxum.pdfIn PDF document text
    • https://digigabatafer.weebly.com/uploads/1/3/5/9/135995708/44881ec3fec2.pdfIn PDF document text
    • http://zitarekatinupas.sportsontheweb.net/luvejovedodenofuniwa.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/W7ahfgh/finelofimew.pdfIn PDF document text
    • https://dasukixarukawo.weebly.com/uploads/1/3/2/8/132814138/5857205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://benamow.myartsonline.com/play_nancy_drew_games_online_for_free_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61e2e07-03f8-438b-8190-f0a7a9fbbc74/fatozelure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657f1cde-70c3-4676-8863-552845f607e5/computer_networks_and_internets_with_applications_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fac8a19-616d-429a-8d53-114f07b794fa/jamie_eason_live_fit_phase_1.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_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 5332 bytes
SHA-256: 252f807b13042036a6f222fb7293b7189690dcb9c0246bb11580082a99a65650
font_01_sfnt_off0000f7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A5 10616 bytes
SHA-256: 21249b4c925eccf35862b5b4c9f09478f30c8c05185f3a851559ac8e7c25b4bc

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