Malicious PDF — malware analysis report

Static analysis result for SHA-256 482ae9c7e37e8b7a…

MALICIOUS

PDF

69.9 KB Created: 2021-01-09 17:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 02897cc23c55b942533536845c3bfa11 SHA-1: 24b71bd4ab16db28adb4402e65c7d1d694628536 SHA-256: 482ae9c7e37e8b7a2936c3604a2de4027228303c924c5b4af6ab818b5b853405
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=icdr+rules+consolidation PDF link annotation
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/sezojevonoz_kudanabugovokop.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/49c8d2b5bba663.pdfIn PDF document text
    • https://juvetobewuneted.weebly.com/uploads/1/3/3/9/133997509/fibit_rituriwuba_wivizower_wagaraxilalefug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487905/normal_5fc64cbade9ba.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/fedut-vijodej-vanoxad-tezimop.pdfIn PDF document text
    • https://simoreve.weebly.com/uploads/1/3/4/3/134370914/bijudisosavugalone.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/bokelivarejidogav.pdfIn PDF document text
    • https://kukaweferoba.weebly.com/uploads/1/3/4/7/134754127/zaleduxupos_mujador_devaw_numekib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70f9c9b-b32c-42f9-a25e-6f1abff97736/ford_kuga_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b2fe98-bf19-483a-9d55-a4ac9dff2d36/89722552215.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/57138055954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60671a8a-5e0a-4ea6-8430-420f11e24136/adobe_photoshop_cc_2020_crack_reddit_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/35603569038.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_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 4872 bytes
SHA-256: 94c52befbfffbe4eb9b36cb7edd2dc738f166e872b6c11f63f10fb217130b88d
font_01_sfnt_off0000e8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 10012 bytes
SHA-256: cb885c75df8b9e0a0c9a3d8bac400c91132576a4cb1e70ede6c384228c19cc1c