Malicious PDF — malware analysis report

Static analysis result for SHA-256 8519ec005fea18ee…

MALICIOUS

PDF

71.8 KB Created: 2021-03-30 10:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a1985c226f3fcb970a2ee7200e51aeb SHA-1: 1deb71906c09c4979cca2161c6c66e3cb0bab2d3 SHA-256: 8519ec005fea18eeb13863c95da62febb2f099af49e8b654a875bdd9bbf78dfe
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=kwikset+powerbolt+2+beeping PDF link annotation
    • http://bodipok.getenjoyment.net/panasonic_kx-tge233b_cordless_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujuva/iehf2k0/adobe_scan_free.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/le_capital_marx_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/dOwgigj/dogovolaxeb.pdfIn PDF document text
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/likowenoti.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/QEjeIar/pogs_military_money.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/TZgfV4B/real_racing_3_apk_obb_rexdl.pdfIn PDF document text
    • https://rolurenogilu.weebly.com/uploads/1/3/4/0/134096536/08004559f75ff31.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/whbCidU/20806793512.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/ecological_theory_in_social_work.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/ieFggjd/cyberpunk_city_wallpaper_1920x1080.pdfIn PDF document text
    • https://kofagegupuk.weebly.com/uploads/1/3/2/3/132302723/52d5bed.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/Z3gf8jg/light_me_up_like_dynamite.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/gj850SI/92820781405.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_e92808216e7e4ec7aac9dac5629cdcb0.pdf?index=trueIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_bec593bd1185409fbc8a7c3d3de4b3da.pdf?index=trueIn PDF document text
    • http://palelezugob.onlinewebshop.net/what_was_the_economic_social_and_political_impact_of_the_american_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/500a63fd-795f-4460-9f1f-e80e48b53fda/new_monster_ducati_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1cffe5-03bc-4489-ae9d-1b1db91476f6/fipidiseperi.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_503f34e86f1e47b58f922878d99e1541.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_off0000dbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB4 5172 bytes
SHA-256: e6b783df47612ce272f5a4a028167b4fd5178637beca6cd31b01e8de3c7baefd
font_01_sfnt_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 10756 bytes
SHA-256: ad1c71afc41d6cc934623fed5ca3046ffb731d8af17ff28fc301c86cccf25f92