Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec83807a7ea83f7…

MALICIOUS

PDF

65.5 KB Created: 2021-01-12 19:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de2698a3bf3ffa5caf8cb6edde719f03 SHA-1: dcf163ed85bc8d6354507f6c2533af6285c9f939 SHA-256: 9ec83807a7ea83f7d49cb18f35fc866016dad5d26728c21fba2d4158d42742ef
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs, including one pointing to 'traffnew.ru', suggesting a phishing or malware distribution lure. The PDF's structure and embedded links indicate it's designed to redirect users to potentially harmful external content.

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://traffnew.ru/123?utm_term=social+media+essay+pdf PDF link annotation
    • https://site-1178186.mozfiles.com/files/1178186/cluster_computing_and_grid_computing.pdfIn PDF document text
    • https://site-1171591.mozfiles.com/files/1171591/best_funny_videos_for_whatsapp_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ii4iciC/91741014780.pdfIn PDF document text
    • https://site-1174085.mozfiles.com/files/1174085/dofumag.pdfIn PDF document text
    • https://kenibojowosude.weebly.com/uploads/1/3/5/3/135324683/2d601f3d34d938.pdfIn PDF document text
    • https://site-1167928.mozfiles.com/files/1167928/75808590042.pdfIn PDF document text
    • https://site-1204325.mozfiles.com/files/1204325/80204416482.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/fumutexanoferi.pdfIn PDF document text
    • https://site-1206062.mozfiles.com/files/1206062/74874318839.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/iiRibHM/74455833992.pdfIn PDF document text
    • https://nikibowo.weebly.com/uploads/1/3/4/3/134354591/vuweruxo_lisaf_xizulutezunudi_dubojezisagatib.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/towakog/torch_browser_browser.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bitmap_books_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/school_calendar_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/zte_axon_7_mini_android_oreo.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_off0000c40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40F 5408 bytes
SHA-256: 67105ef24c0dc3cd08a0d33a9eaeb5c8389452a6757cc37184b99209cdbdb090
font_01_sfnt_off0000d66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66E 10104 bytes
SHA-256: d28325c1c8c72b95e6547194831043930e89cc576d58c475b158be93b8e97eb3

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