Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0ccbdc2b508e9c…

MALICIOUS

PDF

67.8 KB Created: 2021-02-25 06:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b9c81516b8eab76189e9aa2e5d6b2d09 SHA-1: af56f5d31940187a8900777cca0e8a8a49e5fe07 SHA-256: 5d0ccbdc2b508e9c39b4d051be8ff92125e4198adce6869757e8bbdf5c7dbcf8
226 Risk Score

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://druttle.ru/award?keyword=why+won%2527t+my+brother+printer+print+in+color PDF link annotation
    • http://tewovenaj.22web.org/lipokitejujakarinikumo.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/xibinadejapusumu.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/ifgcvjb/30911606545.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/hg5icgj/coin_drop_hoop_earrings.pdfIn PDF document text
    • http://wopebexe.66ghz.com/loughborough_lake_fishing_guides.pdfIn PDF document text
    • https://cdn.sqhk.co/vebudirepo/edUicid/larinobekasud.pdfIn PDF document text
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/2402440.pdfIn PDF document text
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/209f7b661362b.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/ri0tidn/super_bubble_pop_neo_geo_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/uAUOpgc/cat_physics_bonus_pack_level_32.pdfIn PDF document text
    • https://cdn.sqhk.co/zapakolozu/iaA6jsm/high_fade_with_curly_hair_black_male.pdfIn PDF document text
    • https://cdn.sqhk.co/rewaloxuruvu/djgwSic/pexotalosobefosufiluxiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://serobamemesazan.rf.gd/22037117276.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/agatha_christie_books_online.pdfIn PDF document text
    • http://bovinow.epizy.com/xebijapiduwaresuxojagoz.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_off0000ce5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5C 5168 bytes
SHA-256: 8aff74c5e2d5abca5a933bcc72be536aa4a5cce92256af65a71c76c6037e70b1
font_01_sfnt_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 9928 bytes
SHA-256: cc7050ef4ab91c175fb0ffa8bb4f83e06e6652eeab0e6ba7e39847d8544d674a

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