Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bbccc00fd5a2f7…

MALICIOUS

PDF

80.6 KB Created: 2021-03-16 05:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d89d9ddb97ea7ebceab9038b9bf162db SHA-1: df4daf0268def8981e802bbe869ddda6d8999957 SHA-256: a7bbccc00fd5a2f790051d26c87de85b072bf99e401c356dffd9013e2a3cf412
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded URLs and the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://ponafet.ru/award?keyword=ccrt+pdf+mrunal PDF link annotation
    • https://cdn.sqhk.co/duxadikoti/hKjeeC7/stay_alive_lyrics_hamilton.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_5fcc0c0fdb038.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/5845c07cdcb7a.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/xapamizeku-fedowi.pdfIn PDF document text
    • https://nazorilorapumug.weebly.com/uploads/1/3/0/7/130776423/gubirijunezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_600d6bb5b0e4d.pdfIn PDF document text
    • https://sinegaxoxu.weebly.com/uploads/1/3/4/4/134462527/netafevunered.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/ekShLih/scarfall_the_royale_combat_apk_download_uptodown.pdfIn PDF document text
    • https://sexaximelukifa.weebly.com/uploads/1/3/1/0/131069869/zotefakemalefaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5fe058589222e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_6047c5b141afc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ccb899-b44f-4f40-b346-59e5610a5f64/tipler_physics_for_scientists_and_engineers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657a2ac7-26bb-44a1-aa78-5e5744347ea5/adobe_premiere_pro_cc_2020_transitions_pack_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab7ece5-2ad2-46c8-bf95-b3795e0b5ccc/my_samsung_dryer_wont_heat_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8cd1fb-74bb-4ef0-8da1-8809d67a0799/80670700566.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/landslide_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/2d_and_3d_shapes_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828dda68-6207-43ec-9a69-0577550ed667/98329967392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b57210-b7b6-443c-bb4c-12e166270757/daisy_powerline_880_pump_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/52030907967.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_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 5028 bytes
SHA-256: 061448d9f3237df1949d9b038036eb5c92b086304ab18e8508196c5afc545e26
font_01_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFE 10948 bytes
SHA-256: 3fcfb9e3b06de71e0baa0c263f72d50c60f82e50dc32529de3ff0c824ee8c146