Malicious PDF — malware analysis report

Static analysis result for SHA-256 accbdfea2e8a5de5…

MALICIOUS

PDF

78.9 KB Created: 2021-03-17 10:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a255cf3802c452a58260c90dd43ee0be SHA-1: 2aa61073201263dbec7baf88be47b49505ff2a57 SHA-256: accbdfea2e8a5de554e2dacff75c59f513519137e76ee58d1e44acf257ffe7b3
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that point to disposable hosting and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=how+to+set+a+homepage+in+microsoft+edge PDF link annotation
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/databebep.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/putovu.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/jhhhUX6/line_colour_3d_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gawivoxolo/Atidhia/64685906940.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/zokaxubopajegorofurujis.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/iiicxie/zopijobokogitib.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/imperial_leather_mcclintock_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/jorubili/hldoidI/xuzosozavifivukavowekis.pdfIn PDF document text
    • http://japancar-sib.ru/84681108152ifrhf.pdfIn PDF document text
    • http://worldworkbook.com/839070537923zqrg.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/keto-enol_tautomerization_is_an_important_mechanism_in_glycolysis._what_does_this_involveclr8z.pdfIn PDF document text
    • https://malugula.weebly.com/uploads/1/3/2/6/132695531/3040f47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotizifime/buzirawuzuxufufigon.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/electrical_engineering_basics_free_download.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/nesanirumixotokubabadi.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/zutekub.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/steps_to_eclipse_for_selenium.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/how_to_control_position_of_dc_motor.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_53d5a770e0b04f349c5de1ed32c07126.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_82e64b9d8bc3453d8ec09e7b1a873bd5.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_d9f7ba336e1641e4a075946099810bc3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A6 5588 bytes
SHA-256: 5a7d1eae66dc14e958cef32cc90cbe066acee5c54d6e68dba46d2268bcdab89d
font_01_sfnt_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 10288 bytes
SHA-256: a799e6b929db9eda2c43e94514ab40cd1c311222e5eaee8f9031b89142a4bcf9
font_02_sfnt_off000118c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C9 16084 bytes
SHA-256: 192e1cf8743c95d644f41697cb32af4f2bd92b7888e96aef7f61385a8dcfe722

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