Malicious PDF — malware analysis report

Static analysis result for SHA-256 beff9fc60d980061…

MALICIOUS

PDF

102.5 KB Created: 2021-04-01 07:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8bd03379c20eca0c136aecc84919112b SHA-1: 80da812bd3fb33384965abd1333e4fb9900b3bb9 SHA-256: beff9fc60d980061922386f341c40053f7f947b9ba63f8265aee566e0c02b3b5
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 0.9997

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 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://botokaw.ru/123?utm_term=electronic+money+issuers+guidelines PDF link annotation
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/4e4ca0b860.pdfIn PDF document text
    • http://kismyketio.com/44256149287mmxn2.pdfIn PDF document text
    • http://homebig.space/giduwu70b59.pdfIn PDF document text
    • http://legiontry.online/xarajurabexepodetudor50qk.pdfIn PDF document text
    • http://busibear.com/720227325350na2u.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/pobanokezajimeg_jobupepo.pdfIn PDF document text
    • http://bilkan.fun/bemikinofamenevebiduvilieqpvt.pdfIn PDF document text
    • http://dulexip.22web.org/59781848629.pdfIn PDF document text
    • https://berapozi.weebly.com/uploads/1/3/0/7/130776213/fizevolaguzo.pdfIn PDF document text
    • http://leftoutclub.com/history_of_christianity_in_america_book7rbcw.pdfIn PDF document text
    • http://azalea.store/battle_stick_dragon_tournament_legend_mod_apk_downloadqdusb.pdfIn PDF document text
    • http://opensalle.xyz/armattan_rooster_manual0h49w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3248dd2-3ebd-4041-af8e-67c4d6377cad/67588201926.pdfIn PDF document text
    • https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_98d4cd28ca2a4972a7d694f291b14983.pdf?index=trueIn PDF document text
    • http://ridexinawaje.epizy.com/movie_maker_windows_10_download_softonic.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_4bc37b981c1e4ccbaa309379d2a00396.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4d5b6b-cbee-4ee7-acac-8c39689cda5e/best_master_of_orion_game.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_off000155d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D0 5108 bytes
SHA-256: 5f279ad59b424ec0a47a15a4bcd5d8ccc32cce650adbf53afd1019fa10447237
font_01_sfnt_off0001672b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1672B 10784 bytes
SHA-256: d887f0719ee7ce714df982da4e1c93b44b241fea9dc7d314cb318770cc72a0f9