Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2a994113797a0a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 14:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f7254ffb688d4b6f5013a6d628a5618 SHA-1: 2657202300b4ae281a22b6ee55c3b6137c46c7dd SHA-256: ce2a994113797a0a4a8dda068e0c16046ccdc689271f25cb75dd950132bbe26d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=frenchies+of+mystic+complaints PDF link annotation
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/9200971.pdfIn PDF document text
    • https://senaduwofajix.weebly.com/uploads/1/3/0/7/130775021/fureviwowedamon.pdfIn PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/33ee755481cef.pdfIn PDF document text
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/828907.pdfIn PDF document text
    • https://zexuboru.weebly.com/uploads/1/3/2/6/132683252/lewozo.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/behavioral_theory_in_counseling.pdfIn PDF document text
    • https://kigijogi.weebly.com/uploads/1/3/4/7/134702755/wunekebeko_tikadikik.pdfIn PDF document text
    • http://tupujetu.sportsontheweb.net/bisimewi.pdfIn PDF document text
    • https://nogusuxewi.weebly.com/uploads/1/3/1/4/131438155/21451f5.pdfIn PDF document text
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/xutezo.pdfIn PDF document text
    • http://ligexekena.mywebcommunity.org/surufopi.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/86678906289.pdfIn PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/7068283.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/tarajix/temaperoxefenezizu.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/how_to_stop_time_jotaro.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/62467308560.pdfIn PDF document text
    • http://xutenasejubibe.atwebpages.com/sadunis.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/gonizubowutexowexevif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 5312 bytes
SHA-256: 579e6082b532635e98617ab8bfca124513da80e4028ce8d799a76490546790ee
font_01_sfnt_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 11524 bytes
SHA-256: 0850a8fb9df33f237e5af6e5df2955a49202124965d924d68529fb60f4be6e3e

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