Malicious PDF — malware analysis report

Static analysis result for SHA-256 69058f236007e5e3…

MALICIOUS

PDF

76.6 KB Created: 2021-04-30 21:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ecd98dad9dce48c045d32851a6c8442 SHA-1: dff6c0110a079a4d03811ae2774b50832bde6041 SHA-256: 69058f236007e5e3bb20954446f7525661f70011b377a676053c537cb0fa95bf
186 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 0.9996

Heuristics 6

  • 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.
  • 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://zajinet.ru/strik?utm_term=mvc+c%2523+javascript+tutorial PDF link annotation
    • https://cdn.sqhk.co/vonixilavot/ichghgJ/collision_reporting_centre_toronto_toryork.pdfIn PDF document text
    • http://mugedly.xyz/white_christmas_piano_musescorem96o2.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoxoxowex/ihhjfjd/battery_operated_christmas_lights_for_outdoor_use.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/7h6byia/nachiketa_song_halla_bol_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lufasawo/jejbugh/86885929238.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/tigCCrk/shadow_skateboard_apk.pdfIn PDF document text
    • http://faviwogewe.iblogger.org/bekawoketoposivorapufu.pdfIn PDF document text
    • http://copyrighthelpcentral.com/all_my_sons_play_setting4lrjw.pdfIn PDF document text
    • http://demask.space/telazomavadoma1y6.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/xebaxegewubuno9xdpa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokipobobanokab.rf.gd/fakafawiwuvivogoxobuvaraf.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/21850540782.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_b98886a120e04338a9cac1960217676b.pdf?index=trueIn PDF document text
    • http://fobufalezax.epizy.com/commercial_lease_agreement_form.pdfIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_5e2ef4f16c274b44ae2f85236c064798.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/wodinofab.pdfIn PDF document text
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_5dbcdfa0292d4369a45368f0412ae8af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/fegesaxoluruwekunutuxon.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/88434265950.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/tai_avatar_258_android.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/12th_time_table_2020_up_board.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_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 4344 bytes
SHA-256: eda0cc8d92ffd456c89ddccde5ba66fe1c943d0fb6a5fdb4c6f5f7b0d9e75b6b
font_01_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 11124 bytes
SHA-256: 3bbcee2608a0f43e8e8d2b0942ee0540bf9e1f0f3b3cfc5d9d3fed05beed6e52

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