Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a65a24ffa32b65…

MALICIOUS

PDF

71.8 KB Created: 2021-01-25 09:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ad8ba290c13843298ad347e10b4b11 SHA-1: d9f5dc09896bd1e267d11b9be0cc97a290d88ea4 SHA-256: c2a65a24ffa32b65f138849bd8b009c0ada208b11a2dccb381ee182f7a3c2193
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to URL parameters and application versions, further supporting the link farm and potential distribution vector.

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=classical+guitar+songs+easy
    • http://bupetud.xyz/wolf_quest_2._7_free_download_full_versiongxz92.pdf
    • http://mrt-zdes.ru/bunny_buns_coder1mun.pdf
    • http://kidunotofonaxiz.22web.org/komoga.pdf
    • https://static.s123-cdn-static.com/uploads/4465694/normal_5ff5734e30cc9.pdf
    • https://static.s123-cdn-static.com/uploads/4446286/normal_5fdf1ca82205a.pdf
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/8613674.pdf
    • https://cdn-cms.f-static.net/uploads/4451205/normal_5fd1b51b142c6.pdf
    • http://technodom11.com/29884493191boect.pdf
    • https://nagalijas.weebly.com/uploads/1/3/1/3/131398542/sitanokir.pdf
    • https://cdn-cms.f-static.net/uploads/4373779/normal_600ddbf11c946.pdf
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/06ae69723.pdf
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/bamozizitu.pdf
    • http://richteam.site/90336831227hiyc9.pdf
    • http://masito.space/89132693414rkbqp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pafiganovavi/apsrtc_app_apk.pdf
    • https://s3.amazonaws.com/sajatofubote/urdu_taqreer_books_free.pdf
    • http://nekofixas.rf.gd/2008_bmw_m5_v10_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1f.bin
3f42687ac1acbacc0e71a9071434d16e253f8117cf64f9828fc3426ce440c155		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 4976 bytes
font_01_sfnt_off0000ee19.bin
ae7878a442c2ee5deb740df54f73905f0859e0b0d70764ccc96fc54427313fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE19 10724 bytes

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