Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc00abd5eb8da73…

MALICIOUS

PDF

95.9 KB Created: 2021-03-01 16:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e2388743c86bda384144c4bda8449866 SHA-1: 3cd3f138bde890e464fe7fe0a6f514ef70b06fa4 SHA-256: bcc00abd5eb8da738f20d02116312e3c208297cedad447d9ee0eaa87714d9571
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm containing numerous external URLs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of many external links suggests an attempt to redirect the user to malicious sites, potentially for phishing or malware distribution.

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 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.
  • 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://baarspo.ru/123?utm_term=columbus+blue+jackets+schedule+preseason PDF link annotation
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/zafila_sijujimaval_rivanowafip.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/manual_j_load_calculation_service.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/how_to_setup_wd_my_cloud_windows_10.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/37c58a37.pdfIn PDF document text
    • https://punujagenak.weebly.com/uploads/1/3/0/7/130775029/cdde6fa.pdfIn PDF document text
    • https://vubedupimobu.weebly.com/uploads/1/3/5/3/135314939/wigijedosepe.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/how_to_check_epson_ink_level.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/darewixolevipepilusa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemigososefof.atwebpages.com/79512446218.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/jager_r6_cosplay_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/enchanting_guide_tbc_2._4._3.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/wusejavaji.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/dell_latitude_d830_ram_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/81869204759.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/10354044083.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/android_emulator_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/subordinating_conjunctions_worksheets.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
    • 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_off00011284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11284 5496 bytes
SHA-256: fc46a6a57ae73d660da57e96f4c8595906b465f3600e3ae3458fdc61b88c6dc9
font_01_sfnt_off000124ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FF 17880 bytes
SHA-256: ab62ef7ae937e1360ca43ec0556f61c680ad298d52d02985efc3408b7d966cfc
font_02_sfnt_off00015b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B1D 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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