Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdbe18b0b3ba83a…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 20:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 699af15feca5259068b58276347e0a34 SHA-1: e2536bafe12654aad596da8983e5f10dccc2e190 SHA-256: fcdbe18b0b3ba83a7fa6c9a35fc3d455ea0ce64706ed4ee591c2e43d24c1e791
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to potentially malicious content hosted on domains like seumenha.ru and detonic-de.website.

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://seumenha.ru/award?keyword=enterprise+and+small+business+principles+practice+and+policy+pdf PDF link annotation
    • http://detonic-de.website/linux_live_usb_ubuntu_isot04ie.pdfIn PDF document text
    • http://comp-arenda.site/6312730900108fzl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fcd1001c9348.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/autocad_civil_3d_profile_view_styles.pdfIn PDF document text
    • http://keep-travel.com/samsung_vrt_plus_washing_machine_ur_code62mcl.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/legetuj.pdfIn PDF document text
    • http://psychologyrelax.xyz/mevowewemuwimuk3srbg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_6039b1034c7e7.pdfIn PDF document text
    • http://persequen.com/what_age_rating_is_terminator_dark_faterg4rg.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/nigimul/whirlpool_duet_sport_washer_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/birla_sun_life_mf_sip_form.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_683a66433ecc45049c7fe0c69381bf06.pdf?index=trueIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_ea84a8a811c54bf680fa761302fac3d8.pdf?index=trueIn PDF document text
    • http://kikanelomer.onlinewebshop.net/how_to_earn_brownie_bug_badge.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/adobe_photoshop_cs5_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/53875117227.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/because_of_mr_terupt_guided_reading_level.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/gogabelanevobetoragomu.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/82216739684.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_964f663a2c474e5699eb871750799014.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/33674125144.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_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 5500 bytes
SHA-256: 43699add7f53962f9ea3aa12b40965d2db702a6e07c3978195b45e812cf2b97d
font_01_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 10368 bytes
SHA-256: 7f96da4844581dad24c7b62defcbd9382e37197cb90810a4403bd90f7d5bfa72

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