Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0b02da2c11c018…

MALICIOUS

PDF

79.8 KB Created: 2020-11-22 19:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ddd1096fae163aeec70a89d05af39cf1 SHA-1: 189b478f0814c02a0a25883f8a15de7189509aab SHA-256: fd0b02da2c11c0188a536b29d5b07feb6c8c9b64ac08faca2aa094cb3005f8fb
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including a known malicious redirector at 'traffking.ru'. The document body, though heavily obfuscated, suggests a lure related to an 'onboarding process template'. The presence of numerous PDF links and a critical heuristic firing for malicious redirector links strongly indicates a phishing or redirection attempt. No scripts were extracted from this sample.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=onboarding+process+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5f9132f9d1b1a.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/f0765496319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f9c649723d25.pdfIn PDF document text
    • https://sububavujowiv.weebly.com/uploads/1/3/4/4/134460245/tavidebarafiwubed.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/fewoxepiduxemus.pdfIn PDF document text
    • https://wijejotuxaketuv.weebly.com/uploads/1/3/4/3/134338978/552ae.pdfIn PDF document text
    • https://rovajomodurimof.weebly.com/uploads/1/3/4/7/134719391/bb4d464c7ed24.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/tibitexil/analytical_chemistry_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/sonowojobusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516c22a5-9f61-4575-bb3c-4ff2e88d3b93/90710967629.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/20170450890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd854d1-24fb-4529-911d-b2242a5e78b3/54138177871.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/40890322146.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/jds_labs_element_vs_element_ii.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_off0000d074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD074 5560 bytes
SHA-256: 925c4dfbfd4436aa58dc7d5482d8c7d36887cb5705fdc0e240ef07849b46bd8c
font_01_sfnt_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 6000 bytes
SHA-256: 25695b1c12c421d3e43a5e30188f1f311e40babc417b73acc2b251f2fa5aa762
font_02_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 10440 bytes
SHA-256: 3d1963588e15c14e6f9075af38b0db337cbdfad260d5b33db121f29046ef6917
font_03_sfnt_off000119b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 17348 bytes
SHA-256: 671a193ebb4c0162d355e370d2cb9fae7337da1c6ef3e51c677ddccf1b62f5cf

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