Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd94ef5e42b3cb5…

MALICIOUS

PDF

73.8 KB Created: 2021-03-10 19:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4ed9c067df5281b7e52448ad24649c44 SHA-1: 580433b97306b75bc6b65e72c561991b16d1125d SHA-256: ccd94ef5e42b3cb5aa21de8e26d23e93a22ba0db07c1fd2fe7d366ab9b83f60a
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 0.9998

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://kuzutuzo.ru/strik?utm_term=wordly+wise+3000+book+11+answer+key+free PDF link annotation
    • http://chestlune.online/81698925961sk6lj.pdfIn PDF document text
    • http://malespw.xyz/hp_elitedesk_800_g1_sff_datenblatt33l3v.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/castle_rock_usa_stand_by_metcsio.pdfIn PDF document text
    • http://kigazuvunawolux.iblogger.org/unity_in_action_github.pdfIn PDF document text
    • http://20970907.net/lactinex_davis_drug_guidepfsw1.pdfIn PDF document text
    • http://monabis.iblogger.org/abb_magmaster_datasheet.pdfIn PDF document text
    • http://paktum.pro/39207362574yzg5v.pdfIn PDF document text
    • http://contact-git.top/azitromicina_900_bula2iy44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jufowepazo.rf.gd/the_shadow_rising_robert_jordan.pdfIn PDF document text
    • http://jamenafa.epizy.com/jdk_8_filehippo.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_bbc8c27e5d03464fa88ee7e642e12eea.pdf?index=trueIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_22438652ca9b463ea181f837651c5a7e.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_49ca1af974054b06bb6b92a72074978b.pdf?index=trueIn PDF document text
    • http://nepanazunisemi.epizy.com/zusir.pdfIn PDF document text
    • http://bazogojuzularib.rf.gd/49222787461.pdfIn PDF document text
    • http://xevikosurozogin.rf.gd/cute_couple_wallpaper_full_hd.pdfIn PDF document text
    • http://sepazebop.rf.gd/zofadijudom.pdfIn PDF document text
    • http://suvowafavij.epizy.com/zizale.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_5fbddf469fe24ee5a4c50c939f534a42.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 5668 bytes
SHA-256: 2d264db30c886be95561e5c3916d96c437fdc4837c727f14a13283f40601e165
font_01_sfnt_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 10488 bytes
SHA-256: 0785e4b779317449892263ca28d388b0444816d88db7ef29ee2dfea1fce69437