Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ba50fe9699cc49…

MALICIOUS

PDF

81.3 KB Created: 2021-01-11 09:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4a46b3f172104ccc07e76f8cc15b244c SHA-1: 88c32551361b696a640880e39e0bff5bd24e4251 SHA-256: 48ba50fe9699cc4935e59bd7637a6165dacb1e793d9523a310f9441f54fa283d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'Fender stratocaster value guide', aiming to trick users into clicking malicious links.

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://trafffe.ru/aws?utm_term=fender+stratocaster+value+guide PDF link annotation
    • https://site-1176370.mozfiles.com/files/1176370/skins_cast_now.pdfIn PDF document text
    • https://vadanuburizupi.weebly.com/uploads/1/3/4/9/134901301/c8d9d73677f.pdfIn PDF document text
    • https://cdn.sqhk.co/pojukitogex/iigijGO/pevijaluwezupojebikalego.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/1f453f10.pdfIn PDF document text
    • https://kovibokasekur.weebly.com/uploads/1/3/4/8/134880184/zobowupif.pdfIn PDF document text
    • https://site-1172263.mozfiles.com/files/1172263/82415663991.pdfIn PDF document text
    • https://site-1175548.mozfiles.com/files/1175548/25330550762.pdfIn PDF document text
    • https://fapasinexiri.weebly.com/uploads/1/3/4/3/134346339/wepirotafoto.pdfIn PDF document text
    • https://site-1168207.mozfiles.com/files/1168207/best_craft_glue_gun_nz.pdfIn PDF document text
    • https://site-1173526.mozfiles.com/files/1173526/78617103575.pdfIn PDF document text
    • https://site-1168046.mozfiles.com/files/1168046/koxawalove.pdfIn PDF document text
    • https://site-1172435.mozfiles.com/files/1172435/snake_io_mod_apk_all_unlocked.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/ronatiduzoxij/kepes.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/choo_choo_maari_song_free.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_off00010049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10049 5124 bytes
SHA-256: 0aff6b24bfea975996533554e6481a6520d143649422f8c0cbf417de98e70f03
font_01_sfnt_off000111d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D1 11220 bytes
SHA-256: 5bfc4f88f5fcfa0a529b8019f2901ea5163c115de6f6dd0035d1b2168f2d97cf

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