Malicious PDF — malware analysis report

Static analysis result for SHA-256 1feeb0075e3e21ef…

MALICIOUS

PDF

94.8 KB Created: 2021-01-27 13:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: da6f093a2ce1fb7c76b9fb5c41d9ca65 SHA-1: 743922adb190b06c4a63eeb985e161b6cda08027 SHA-256: 1feeb0075e3e21ef58c6671bc987adfc0c5c9777c1bb5f0a297f8cb89b9c17d8
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 'trafffi.ru' and a keyword related to 'exorbitant privilege explained'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/wb?keyword=exorbitant%20privilege%20explained PDF link annotation
    • https://koxewujinam.weebly.com/uploads/1/3/3/9/133986689/noxuzedufenujes-nevabigaxexus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_5fdba892b80c1.pdfIn PDF document text
    • http://loveantravel.xyz/49019878248l7u0g.pdfIn PDF document text
    • http://fitdieta.com/98116572589rvgj5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417138/normal_6005d346e5dab.pdfIn PDF document text
    • http://itagreen.fun/449458235146haus.pdfIn PDF document text
    • http://reactivascotia2020.com/new_fruit_pop_bubble_shooter_mod_apkgdnn2.pdfIn PDF document text
    • https://dirotazu.weebly.com/uploads/1/3/1/0/131070105/tipunake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_5fd26141d74b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454299/normal_5fd7896a470b4.pdfIn PDF document text
    • http://mxbur.fun/18135515242oefl5.pdfIn PDF document text
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/35ebe9eb55ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xufivutuxalug.rf.gd/huntington_bancshares_inc_annual_report_2018.pdfIn PDF document text
    • http://jukiwifid.rf.gd/79037174232.pdfIn PDF document text
    • http://gegawuwiru.epizy.com/handy_3d_scanner_apk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DF 3048 bytes
SHA-256: dfec36831bd0a731e75c92f6ef2d15d4fa904dfcd9cb8159ddf4e5f2ce119ef8
font_01_sfnt_off00011eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 5172 bytes
SHA-256: e8f49180142b3144e088adf2e806d1fd74599051fdc7017e0d83b2d99f17a6c5
font_02_sfnt_off00013063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13063 12200 bytes
SHA-256: 1f770c38d8b042ce438e991134fd40cf78f840a6a10226c8f58368d9ec9eda96
font_03_sfnt_off00015869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15869 16120 bytes
SHA-256: 2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2

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