Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d04e61a885d29b…

MALICIOUS

PDF

75.4 KB Created: 2021-01-19 01:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c33b7699b81c8205db748a13a0d6505c SHA-1: c0200755039a524c12650fdb15b18fb5076b5061 SHA-256: f4d04e61a885d29b2d0f43900f1fc2841e9699f941da1a989e9eb8c2ec137fc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's purpose is to host many links, likely for phishing or malware delivery. The presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

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://traffset.ru/123?utm_term=heavier+than+heaven+pdf+english PDF link annotation
    • https://cdn.sqhk.co/janonaset/ghfjbjg/mukejewuluwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd66f2742913.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/njgzGgf/grand_vegas_crime_hack_apk.pdfIn PDF document text
    • https://gubepukabo.weebly.com/uploads/1/3/0/8/130873841/zuzatazofevijerow.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/566933.pdfIn PDF document text
    • https://site-1171554.mozfiles.com/files/1171554/18459880686.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/TgevjdI/mk11_aftermath_pre_order_skins.pdfIn PDF document text
    • https://nufodovepitad.weebly.com/uploads/1/3/4/7/134718778/zesilub.pdfIn PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/1567015.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/ibdHhfN/35974261255.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383327/normal_5ff116db8e7ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5febc1ee7fee4.pdfIn PDF document text
    • https://site-1215232.mozfiles.com/files/1215232/ludumujadafemusika.pdfIn PDF document text
    • https://site-1176681.mozfiles.com/files/1176681/kantola_training_pricing.pdfIn PDF document text
    • https://site-1176236.mozfiles.com/files/1176236/32204771664.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/buritekosakile_roweranuzal_wexeberakili.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/datakug-vikaki.pdfIn PDF document text
    • https://tabofeluraratub.weebly.com/uploads/1/3/1/4/131438776/nolulipobuxek_venakaxoropeka_pilavukozuju_bagudupabovi.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://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_off0000dbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDF 5000 bytes
SHA-256: 4a63b7d903b05a514b1f7107de3a05cb60eb977ecb0f06a4a4551f0c4eed8d86
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 11040 bytes
SHA-256: 5ec5ec22b258fdc331b52c5becbb70ac4844fc4dac8d0bbe97fda8c8a399df2c
font_02_sfnt_off00011288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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