Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5b705d597a433f…

MALICIOUS

PDF

78.9 KB Created: 2021-06-07 09:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9f0998b880ae0312d59ea5855b9bf1f8 SHA-1: 51505a479ed2ef8868fa15d2b2fc42038aa66aec SHA-256: 8c5b705d597a433fd42478cf993b77a896709fea58a6360ced1abc17476be17f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL suggesting a lure for game cheats, which is a common tactic for phishing or malware distribution. The presence of multiple external URIs and link farm characteristics further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://laborke.ru/pbw?utm_term=clash+of+clans+apk+para+hilesi+indir+android+oyun+club PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4506131/normal_605b666512265.pdfIn PDF document text
    • https://xovuxajewilim.weebly.com/uploads/1/3/0/7/130775567/96c982447958.pdfIn PDF document text
    • https://nijawefevijabit.weebly.com/uploads/1/3/4/6/134665626/aae93eefd486064.pdfIn PDF document text
    • https://guxenakab.weebly.com/uploads/1/3/5/3/135393472/3143055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_6029a6d9de9d1.pdfIn PDF document text
    • https://talesana.weebly.com/uploads/1/3/4/8/134878252/zunop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_60bd43eb010bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wezenibafasi.pbworks.com/f/pemaro.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144575424/how_to_download_td_bank_statement_online.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/cartoon_guide_to_statistics_free_download.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144564723/kpss_nlisans_trke_deneme_2020.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/download_monster_legends_mod_apk_new_version.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/dabajukavijodawumitami.pdfIn PDF document text
    • http://wotasaful.pbworks.com/f/gewedezotusopazekugilapen.pdfIn PDF document text
    • http://nukuxim.pbworks.com/f/is_an_investment_account_a_current_asset.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/64923550586.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144630699/zarafirefeluvuwirixabewuv.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/10311834976.pdfIn PDF document text
    • http://wekibivu.pbworks.com/f/why_is_my_dyson_v7_motorhead_pulsing.pdfIn PDF document text
    • http://wotasaful.pbworks.com/f/grandma_got_run_over_by_a_reindeer_movie_netflix.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/what_are_the_different_story_structures.pdfIn PDF document text
    • http://dokajawema.pbworks.com/w/file/fetch/144757068/peratekoganerobota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 5376 bytes
SHA-256: bbfa752097ff481114f93fefb0167c3cf2816bb46fbdebf99fddede1606151f2
font_01_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 11932 bytes
SHA-256: e170a2762d2150d544aa38df3163b4fd6a64404cddb49a1afe7b588a57aad71f
font_02_sfnt_off00011d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D14 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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