Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e7b2675216450e…

MALICIOUS

PDF

66.4 KB Created: 2020-11-13 09:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ecfcc3d4e5f44840ffb0a923fc29c8b9 SHA-1: 18e72110e0e0d67ea1e1d922c3466808600c62cd SHA-256: 47e7b2675216450ea98c1e1c5e8072bbb03f2d3a7acff5fb24985503717818b4
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, and it contains a large number of external links, many hosted on disposable domains. The document body, though heavily obfuscated, appears to be a lure related to 'Hitachi bread machine recipes', suggesting a phishing or traffic-driving scheme. The presence of numerous external links indicates an attempt to redirect users to potentially harmful websites.

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://traffset.ru/123?utm_term=hitachi+bread+machine+recipes PDF link annotation
    • https://xodunutejoxefis.weebly.com/uploads/1/3/4/4/134476009/jipodizebugas_wuvugidabo_dalovika_vogoz.pdfIn PDF document text
    • https://bozuzagon.weebly.com/uploads/1/3/4/6/134666742/cd544b75cd9a.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/c52218.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/d6bf5bfa94ac6.pdfIn PDF document text
    • https://poraduke.weebly.com/uploads/1/3/4/3/134385775/3411927.pdfIn PDF document text
    • https://xinejusitap.weebly.com/uploads/1/3/4/6/134630468/jatejuzovivaxe.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/dutoz_tixobegeloliwa.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/taxadifupesafutom.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/c978914c-bd68-4edf-9af8-54f166232c1c/53378571827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32eb202-4f14-4996-811b-b5e555e7acb2/16841752157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a92c147-d4a4-4d9c-98e6-c61959bb5b9b/shadowcraft_mage_3.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/535932a4-e892-4dff-af6a-3e63d345d69a/joan_didion_at_the_dam.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_off0000c799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC799 5380 bytes
SHA-256: d5d517742b3b1b4648f1459e98c06b1bccde6c1046a3995ddef43b355e4da515
font_01_sfnt_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 10448 bytes
SHA-256: 3c4b7b3bbf9e7f02240f76f6ba5fb54ee09faa2a3e849c26cef236cb43663fc0

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