Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc774631d142566…

MALICIOUS

PDF

82.8 KB Created: 2021-03-27 16:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b24ffd8a2d13d93fecfcf18168995f8b SHA-1: 233419eab0922eb76db0b49d1edb90772c865f70 SHA-256: 9dc774631d142566667fa9015404e718a92c46ead0e3d9356c46ef9d1f9c2d73
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing or malware distribution lure, specifically targeting users searching for 'ielts speaking pdf file download'. The presence of external URIs and link farm heuristics further supports its role in distributing malicious content.

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
  • 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://bologen.ru/award?keyword=ielts+speaking+pdf+file+download PDF link annotation
    • http://rifubabesepa.iblogger.org/fisosorazumig.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/ranulevuloza.pdfIn PDF document text
    • http://fudasoba.iblogger.org/1026674925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5fdc05626c116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5fdba749b7a73.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/xefasajonanu.pdfIn PDF document text
    • http://sufevar.22web.org/casket_card_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_605544bb17fa5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vizepojuduw.rf.gd/94906950905.pdfIn PDF document text
    • http://nudipub.rf.gd/faketarawe.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/24870776838.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/2014_harley_davidson_street_glide_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb71925-0fa2-4f97-9285-de2beaff7327/dupunudazitakuriten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e650eb74-2453-48b9-ad40-f5a7cef89a34/does_robinhood_list_penny_stocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1824a390-4f9f-45e4-a19c-1d7fbb16a1eb/autocad_3d_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/zafaxivukilifipinuvufatib.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/oppositional_defiant_disorder_test_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a57b694-855f-40ec-af19-ab00f3102662/zuzumorufuponemimu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 4992 bytes
SHA-256: e5b38ca4851dacdc6251cfdc3331bf3913a47b773960a33fa4bb332d193e4d9e
font_01_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 10944 bytes
SHA-256: fb0c60a9465f3c2948507a951bea7ebf40ff066138d10d2a007be3fda4b18f2e
font_02_sfnt_off00012f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F95 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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