Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14882d407f51673…

MALICIOUS

PDF

63.9 KB Created: 2021-01-09 23:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ccc4290ffe5bd54715065345d1f72f5d SHA-1: a876ff0d974a492808ec9dbc344cfe465bd740a2 SHA-256: c14882d407f51673b0506ee45a183fc169dc42018b4f984740b030d46c46f129
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffnew.ru/aws?utm_term=dead+space+aftermath++free PDF link annotation
    • https://tefitosuwit.weebly.com/uploads/1/3/4/4/134478986/02a8f.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/928634.pdfIn PDF document text
    • https://site-1173911.mozfiles.com/files/1173911/diruminapotanaxagefow.pdfIn PDF document text
    • https://site-1168384.mozfiles.com/files/1168384/screen_recorder_video_recorder_video_editor_free_apk.pdfIn PDF document text
    • https://site-1176597.mozfiles.com/files/1176597/zombie_hunter_sniper_apk_download.pdfIn PDF document text
    • https://belafawejogawol.weebly.com/uploads/1/3/4/5/134583754/jakadaworulozazur.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/5886560.pdfIn PDF document text
    • https://fojulivopex.weebly.com/uploads/1/3/4/7/134718782/3964174.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/7A77Bid/liverpool_fc_iphone_6_wallpaper_hd.pdfIn PDF document text
    • https://site-1178084.mozfiles.com/files/1178084/76036771786.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/zazerut.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/people_nearby_telegram.pdfIn PDF document text
    • https://site-1177370.mozfiles.com/files/1177370/retro_games_collection_app.pdfIn PDF document text
    • https://wotufoxak.weebly.com/uploads/1/3/4/3/134308946/bagexivurevifem.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/xenipedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8A 5360 bytes
SHA-256: 5588d53feb2917870a783cf41628bcef56addcd2a93ca6c767049d380185d389
font_01_sfnt_off0000cda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA9 11212 bytes
SHA-256: bb059b77303bc189335ed27d59386543fab3bc46bbc530dff2d073ec711a7b12

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