Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf002d28ab61eb4…

MALICIOUS

PDF

80.8 KB Created: 2021-02-18 13:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 35ca0738a9c08c79150a67018ea675e5 SHA-1: 6d884cc1e46af27e11d61648d6d06b3464673737 SHA-256: bdf002d28ab61eb47f773bf32a5ff1a79ef64096c8fc0d604c037aecd60059fd
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=islamic+dream+interpretation+book+in+bangla PDF link annotation
    • https://wonozonozosog.weebly.com/uploads/1/3/1/3/131398184/sevuloved.pdfIn PDF document text
    • http://getliterate.online/69815042944kx2i9.pdfIn PDF document text
    • https://rivoliga.weebly.com/uploads/1/3/5/3/135311175/vevofaxiderebesexe.pdfIn PDF document text
    • http://guroxufe.iblogger.org/58551261703.pdfIn PDF document text
    • http://copyrights-notices-helps.com/99405240140ipevu.pdfIn PDF document text
    • https://fufarolobol.weebly.com/uploads/1/3/4/5/134597676/5408124.pdfIn PDF document text
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/pimolavetogubisi.pdfIn PDF document text
    • http://detonic-ordina.website/mamonogozevutotawe0eh9c.pdfIn PDF document text
    • http://tryse.xyz/ladbroke_grove_rail_crash_inquiry_reportr1hh0.pdfIn PDF document text
    • http://tublitalia.space/30920416645sihyk.pdfIn PDF document text
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/vapapalerulamesebizu.pdfIn PDF document text
    • https://fuzefiwojagolo.weebly.com/uploads/1/3/5/3/135308179/40648.pdfIn PDF document text
    • https://dulupuwo.weebly.com/uploads/1/3/5/3/135393712/9787800.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/8065182.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/amores_verdadeiros_telenovela_capitu7lgou.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://dumudolaba.epizy.com/pujugiviwotis.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/repifitagiranelodat.pdfIn PDF document text
    • http://vofufedufis.rf.gd/37967160393.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010679.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10679 19984 bytes
SHA-256: 495e4bfbf3f1ecfb8919f38cc36dffea3948128d0d3554c8cda45f293d8a433d
font_00_sfnt_off0000d10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10F 5320 bytes
SHA-256: 148c91051f725ea2ee7125bf066d8e50054df7cce3fb44226f837994139ad8b1
font_01_sfnt_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 10280 bytes
SHA-256: 292e91b0c751f382cdfff2746163bc21f2b9a860d04f0cea333f62e94833c234
font_03_sfnt_off00012769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12769 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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