Malicious PDF — malware analysis report

Static analysis result for SHA-256 306be93e4e7a308b…

MALICIOUS

PDF

86.7 KB Created: 2021-02-14 22:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 821909c54ed04e5855b05de892898c70 SHA-1: bb3de233fedd05f7dc810e5a91e478c07e6700a2 SHA-256: 306be93e4e7a308b54efd45944f9ed80dc3bee79d94ebfbebd4dd00ac319fbbd
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs is https://seumenha.ru/wix?keyword=eso+trait+research+guide, which is likely part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://seumenha.ru/wix?keyword=eso+trait+research+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407986/normal_600633b0a445e.pdfIn PDF document text
    • https://xefagopabori.weebly.com/uploads/1/3/1/3/131379938/kigofu_bunajera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_6016b8a7c13ad.pdfIn PDF document text
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/wikaxexisemonaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5feee32e9b7e9.pdfIn PDF document text
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/zemokovez.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/157a643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447914/normal_5fcb5e5a48d6a.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/7747980.pdfIn PDF document text
    • http://nofosofeze.iblogger.org/ditotesodoxedaxetip.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/34f49d12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fcda96c5eb93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_5fd1f20066e34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gumupomomoripu.rf.gd/cockles_and_mussels_sheet_music.pdfIn PDF document text
    • http://fozipifi.epizy.com/tisibatukinesufunik.pdfIn PDF document text
    • http://zuxamivim.epizy.com/884310020.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/baofeng_uv_9r_plus_software.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_off00010981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10981 4900 bytes
SHA-256: fdf653bf4205e63332432e5f2d8fab26586acd84cee124ab37de57f896d2705a
font_01_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 10864 bytes
SHA-256: 90c404f8c5e1e73162fb202c94eb3f8654b46dc0b907498179d5f0366579c8db
font_02_sfnt_off00013f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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