Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea883d476bb43dd…

MALICIOUS

PDF

84.4 KB Created: 2021-01-26 02:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 19ac5a018770200223681f78f2e7c271 SHA-1: c5d0ce0d092176ba0b945bf5acbc4571f3116dc3 SHA-256: 8ea883d476bb43dd7d4be48700e201c17ff7f32ba0b5466d7d1d2ca998551d06
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL containing 'candida crusher pdf', suggesting a lure for potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=candida+crusher+pdf PDF link annotation
    • https://gipurafesab.weebly.com/uploads/1/3/1/6/131637457/4976244.pdfIn PDF document text
    • http://datingdate.site/loop_yarn_blanket_bordereuubf.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/0KxNoV5/25499358894.pdfIn PDF document text
    • https://lexabebuwapo.weebly.com/uploads/1/3/1/3/131383838/499c06.pdfIn PDF document text
    • http://allwoman.site/the_last_knife_fighter_real_namen14sg.pdfIn PDF document text
    • http://sushibara.net/puzzle_star_bt21_apk_downloaddemut.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/LThjSGe/zelixowumixatewupezi.pdfIn PDF document text
    • http://nanolenka.xyz/4842799825gz6w1.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/2042271.pdfIn PDF document text
    • http://avto-document.site/48544082750fok88.pdfIn PDF document text
    • https://cdn.sqhk.co/sakixowofeg/0XK2hbI/90018926478.pdfIn PDF document text
    • http://fortuneo.best/argentine_football_association_twitterpew08.pdfIn PDF document text
    • https://wabalolosezuluf.weebly.com/uploads/1/3/4/4/134462862/421111c12cbb6db.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/ddb3d4de6.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/juvoderizanuwipib.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/fizup/forty_years_on_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/15813876257.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/18951925082.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/xewigofenibidamebatulodox.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_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 5116 bytes
SHA-256: bfc7f3add80c5f347df5ba52eb502298d7a5ae5020d86fefb6eede3c02ea627b
font_01_sfnt_off00011d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 10928 bytes
SHA-256: 5438e61da8820c12401d6b01dbcab33ed883c5b8eea24a38a18bcf8983680979

Open this report in the interactive analyzer, or submit your own file for analysis.