Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d1deff20054b85…

MALICIOUS

PDF

147.6 KB Created: 2021-03-05 04:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d818437321fba994f001ac9fd669746 SHA-1: 814b4ce173e6b4415b62eaf57251c44f2a390208 SHA-256: c0d1deff20054b85e356e45f88739c118214b55d7e9caef26400f41f77040743
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://ponafet.ru/wix?keyword=historia+de+la+tabla+periodica+resumida+pdf PDF link annotation
    • http://btsworld.org/agyaat_2_full_movie_freevdxz7.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/G0ihiaO/89404807498.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/chapuib/69902119574.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/gjiMhaV/power_rangers_legacy_wars_free_redeem_codes.pdfIn PDF document text
    • http://busivel.xyz/99591893295v69bq.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/Thijbub/sharpening_stone_wheel.pdfIn PDF document text
    • http://mastericy-chistoty.ru/the_story_of_an_hour_answers8bsgs.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/jtHjjbP/balls_vs_lasers_a_reflex_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/fKA28jb/spider_hero_ragdoll_playground_3d_download.pdfIn PDF document text
    • http://trydouche.xyz/what_is_wisdom_and_understanding_in_the_biblem5zfl.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/f1je4rR/dewovifofezuwa.pdfIn PDF document text
    • https://ribimefisele.weebly.com/uploads/1/3/4/5/134516567/gatutomisaja.pdfIn PDF document text
    • https://netajetuz.weebly.com/uploads/1/3/4/6/134651380/wadin_beluwinaga_zunuv_davoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_94415544e36846efa5c5b21362c4e124.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c335d5-12f8-45de-b58f-62c28cec9de9/63108322334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c9ed2a-4d6f-49f5-aeb6-19d1f11888ad/what_time_does_take_5_oil_change_open_today.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_f40f268944d64266b60b6b18f0497052.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bced818-3e76-462b-b77b-7c6a10933922/will_there_be_another_mysterious_benedict_society_book.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000202f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202F2 5404 bytes
SHA-256: 7f932cc076655c50232bbbf6b3f1a13520dd2c3fc914673ed52e6c5aebbfab2a
font_01_sfnt_off00021531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21531 13072 bytes
SHA-256: 643db2fe2131af0e0d4dcf25289521c6f8868472c87eec76c1143a477a357c97

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