Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f6eb6e3f22d282…

MALICIOUS

PDF

163.4 KB Created: 2021-04-01 10:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 67ebb7d22871bc94155463b83cfb3ee3 SHA-1: 0a162f0ecf6ea819e62a09335349e83760928347 SHA-256: f6f6eb6e3f22d2823f2dfc50e3d0bc3633725770ecea1bd8914e69b4f4cd6af2
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of external URIs and the ML classification indicate malicious intent, likely to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

Heuristics 4

  • 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
  • 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://xezojetit.ru/award?keyword=manual+biomagnetismo+pdf+gratis PDF link annotation
    • https://cdn.sqhk.co/bijilixiger/ljgCjaj/android_10_file_manager_apk.pdfIn PDF document text
    • https://jedadizonavo.weebly.com/uploads/1/3/4/7/134721040/gawidotubozoji.pdfIn PDF document text
    • http://delinapod.mypressonline.com/xodidepexujawaselupegik.pdfIn PDF document text
    • https://pelozaxuji.weebly.com/uploads/1/3/2/6/132680784/vimituwedixalup-silirek-soxoz-novisiso.pdfIn PDF document text
    • https://lozoliso.weebly.com/uploads/1/3/4/7/134775557/powediwezewiv.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/1868852.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/hjcgfdr/farkle_rules_free.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/GNgeUge/rock_hero_receivers.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoziku/EgccjgL/upcoming_fight_this_weekend.pdfIn PDF document text
    • http://zumasuxujole.22web.org/cannondale_quick_neo_manual.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/motetupibetifik.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/jhjVgiq/rimozidaf.pdfIn PDF document text
    • http://narelavupes.22web.org/lazokagudipalazabulefewiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofupugixujodin.epizy.com/injury_report_vikings_vs_rams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a8c004-6f01-4f0f-aee4-7cdd0873ffe3/how_to_work_out_compound_area.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/abdominal_ultrasound_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6cdf59-19c8-4b7a-8fd4-85cfc8ef3a07/pogovukejelekoruxokuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b3cc63-0e15-4b4f-b399-155a76edf9fe/sharing_a_twitter_post_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105bb14a-663b-4d37-82fb-9a70261bcd4b/rezigurugukenikev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581bdcf2-2050-4f8c-a827-11e330521a55/95604054566.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25EC1 5508 bytes
SHA-256: 1b7ef7bbcb13dd98772a2a5c13522549f0ef9c3077c73f65675d593f0312a4ce

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