Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72244954d57510f…

MALICIOUS

PDF

81.6 KB Created: 2021-03-10 14:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a6f0c4218a5f49e86c7f9c8baebb1d8 SHA-1: 2be226e94564f03a69ffb4d0df10af429a0103cb SHA-256: e72244954d57510ff73e42a4d7762d26ee6e488f725b4d98acb3f3725264285e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://botokaw.ru/strik?utm_term=what+does+a+baby+bump+look+like+at+12+weeks PDF link annotation
    • http://wipunemobak.mygamesonline.org/xerox_wc_7845_i_specs.pdfIn PDF document text
    • http://werenntaq.online/11969037016duj3m.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/how_to_tie_nylon_rope_knots.pdfIn PDF document text
    • https://wibabuxef.weebly.com/uploads/1/3/1/3/131380054/3890713.pdfIn PDF document text
    • http://stassikorskyi.com/how_to_install_graco_4ever_4_in_1_car_seat_forward_facingcmly2.pdfIn PDF document text
    • http://knitfqph.site/manekikyyiyf.pdfIn PDF document text
    • http://wosozage.mypressonline.com/wubitopoti.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/56330389457.pdfIn PDF document text
    • https://derufobi.weebly.com/uploads/1/3/2/6/132682106/23b3b27e58da2.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/25670024340.pdfIn PDF document text
    • https://sekeratogo.weebly.com/uploads/1/3/4/6/134683690/bisamujij.pdfIn PDF document text
    • https://cdn.sqhk.co/pupumukisev/dgiBd6O/gaxegilawolop.pdfIn PDF document text
    • https://xujurewe.weebly.com/uploads/1/3/4/8/134865393/4380c0.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/ce3dc.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovixewin/Chghdib/machine_gun_kelly_age_megan_fox.pdfIn PDF document text
    • http://revadadijavu.22web.org/frc_2_curse_of_the_azure_bonds.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
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_e20b7291f2094aafba6c106c6fd2d12f.pdf?index=trueIn PDF document text
    • http://fubatasofofezo.rf.gd/xupokovotovilemi.pdfIn PDF document text
    • http://makowadoka.epizy.com/jabra_evolve_75_user_guide.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_f82f6c7bade24db78aca3fb04721e097.pdf?index=trueIn 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_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 5472 bytes
SHA-256: 05f272af9ac2d0d82c155b6161ce127a64041a846283c55e788e021aa67a735e
font_01_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 11480 bytes
SHA-256: a199b48ba037de61aefbe6a8f1b94a9d9f84d29a02f612ab03ea2c5fcf8c307e
font_02_sfnt_off00012a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A58 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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