Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9cc83661795e91…

MALICIOUS

PDF

72.8 KB Created: 2021-03-25 16:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 097b021e7df738af287c033d4a552c7a SHA-1: 1cd95a7bb1e9a3cb937c55cc194306335e7b8e09 SHA-256: 7b9cc83661795e91c64bdaf7f23ffc303e233348c849339af8faf0c259c20e42
156 Risk Score

Malware Insights

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

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 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/strik?utm_term=draw+more+furries+pdf+online PDF link annotation
    • http://wejowadizabudex.mypressonline.com/gevana.pdfIn PDF document text
    • https://marexuja.weebly.com/uploads/1/3/6/0/136056735/1794796.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/vixojagobepajaminobeg.pdfIn PDF document text
    • https://tobosuxonekid.weebly.com/uploads/1/3/4/4/134493818/6813289.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/carleton_campus_map.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/7307044370.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/fejififimaketo/12378239227.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/samsung_vrt_washer_error_codes_nd.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/fadofofoxuxopedurufen.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/what_were_the_terms_of_the_treaty_of_paris_of_1783_and_how_did_it_help_establish_the_united_states.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/wulimepisimuvixetegolex.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/ruporezixinapiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/6401536816.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/why_is_the_competition_act_important_for_businesses.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/commandos_game_free_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/xukosemizividiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/motorola_surfboard_sbg6580_software_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/dojagusitij.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 5276 bytes
SHA-256: bd3e17574a09be90117b5ec1b032e42bca06c7a332f072f0023014b192ed00cd
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 10064 bytes
SHA-256: 882a0594423d683070ee36b11e27fe422d298632ce9582b2fb5d2c7a4071e74c

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