Malicious PDF — malware analysis report

Static analysis result for SHA-256 4625ebed8267056d…

MALICIOUS

PDF

71.1 KB Created: 2021-02-08 15:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a3671a47c58b166e1013f0a6550b86b6 SHA-1: 0422ab437d548d7cf5b726c4d1559d0ee29c0988 SHA-256: 4625ebed8267056d1630f2a8527227befa30ee6728d67a674778bad7fe201345
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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://jottigo.ru/wb?keyword=3d%20photo%20on%20facebook%20android PDF link annotation
    • https://cdn.sqhk.co/xekemini/jcgfvjb/basketball_shooting_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/heJhfgj/fufefejuzedoburitumazu.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/jukej-sutuwanagede-tesobosoda-gepofolux.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/Pjfi1LN/wanezunifemonagomurivise.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/ihKijQX/slapping_sound_crossword.pdfIn PDF document text
    • http://thrivewebs.com/5593632221015xti.pdfIn PDF document text
    • https://bipufufutugudov.weebly.com/uploads/1/3/1/1/131164095/8ccfc.pdfIn PDF document text
    • http://avlto.best/gugubetenitufaga9jltp.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/dTGHia4/49535837755.pdfIn PDF document text
    • http://bigno.space/nozonimomafexinrmhwm.pdfIn PDF document text
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/warejotoxuvuwidafus.pdfIn PDF document text
    • http://anyita.space/lanisojuvamufow1v2op.pdfIn PDF document text
    • http://axecheat8.xyz/69712574662y081y.pdfIn PDF document text
    • https://xadonuxezi.weebly.com/uploads/1/3/4/1/134131919/rumegavuvup-soguj-duveke.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/fowunutokex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nevowimo/expected_date_of_delivery_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/23144505391.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/geographical_indications_act_1999.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_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 5304 bytes
SHA-256: 8763a959903d5ec931e19413de8f2f8429c89dd0747d6d5e2b2a1063367985c5
font_01_sfnt_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 10900 bytes
SHA-256: 9b9bca6eb375cd48eb7a7ab339ef86e4ee56023d4c1731c8f7b0ea50c058ff62

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