Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d31d887948d398a…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 23:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c9af0ffb92415c9c4a676322c4155ed3 SHA-1: 20b314143927fd7012031e1aaffc1e31b3d97b2b SHA-256: 8d31d887948d398aaaaa61abbc074df30d3e7b1c5f8bb27d7112eaa3c298e1c5
156 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 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=ordering+your+private+world+review PDF link annotation
    • https://bulobazopikiju.weebly.com/uploads/1/3/0/7/130776241/619c4.pdfIn PDF document text
    • http://poroda.site/why_is_my_apple_keyboard_not_supported_by_my_ipad6vxp9.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/how_long_does_thermometer_stay_under_tongue.pdfIn PDF document text
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/2090834.pdfIn PDF document text
    • http://pshcomonhere.xyz/tv_advertisement_ringtones_free_downloadm88eb.pdfIn PDF document text
    • http://blankid.ru/fifewotevobibhol5h.pdfIn PDF document text
    • http://murerejomijuv.22web.org/types_of_ocean_thermal_energy_conversion_systems.pdfIn PDF document text
    • http://xubixaxar.22web.org/alliance_leveling_guide_classic_night_elf.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/american_red_cross_first_aid_classes_near_me.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/jidosatikim/burgundy_high_heel_platform_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/birth_chart_compatibility_free_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/windows_10_64_bit_full_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/daworexanizozibidezolo.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/94862244648.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/99080088880.pdfIn PDF document text
    • http://bosefijov.epizy.com/gijaxopasedebiwebes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 5228 bytes
SHA-256: 1f3a5b0b1956f234fc46b4771789ccab70134b9af388a6b2affcdab2414e6ff4
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 10480 bytes
SHA-256: d62c4041387df3a1c0a66550e0725fcb6b5f308f6ebc4bf853dbe791a0d5f8af

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