Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0e4bef7df61ed6…

MALICIOUS

PDF

74.5 KB Created: 2021-01-28 15:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b8bdccdcd0f02aceb962c90bb961fafb SHA-1: e47d6a7fcb6dd2ab9f097da10d57694d4e7e2c2a SHA-256: 7e0e4bef7df61ed6efe909f37bcf69b320d634f179b81cfc13f4161b875375f5
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external URLs pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO spam. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but no direct instructions or executable content were found within the readable portion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/123?utm_term=boo+radley+house+description+quotes PDF link annotation
    • http://webdefilmizle.com/rilakikerisezedepovoka074ex.pdfIn PDF document text
    • http://kurs1.xyz/viking_village_apartments_salem_oregoneukot.pdfIn PDF document text
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/vutokibi_bokoxu_mumamenewa.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/saposezogaweme.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/gciUWji/duck_hunting_wisconsin_time.pdfIn PDF document text
    • http://vuvuga.xyz/418278041301gmzt.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/4592419188.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/1144449.pdfIn PDF document text
    • https://lugarulanug.weebly.com/uploads/1/3/5/3/135383187/7819844.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/xataruxugo_jarakamu_lurolutax.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/ifhcjfK/97210019703.pdfIn PDF document text
    • http://1xbets-regs.site/feed_instagram_app_androidowfyj.pdfIn PDF document text
    • https://zujefimobob.weebly.com/uploads/1/3/1/4/131453463/vozufunaxezadajujose.pdfIn PDF document text
    • https://cdn.sqhk.co/nugunexinazo/ggeQSjf/39025424352.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/cDvoS5w/flick_shoot_2_hack_ios.pdfIn PDF document text
    • https://xixivisowokote.weebly.com/uploads/1/3/2/8/132814838/lijimosabenaraj.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/L7NgeHJ/91539241003.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://maboruj.rf.gd/18000533763.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/xixofelakosebozukimuza.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_off0000d9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AD 5320 bytes
SHA-256: 2a862e728a149fb5d00ff33bc639029e88ae530632af85476bcf02d7cfb6e74b
font_01_sfnt_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 10280 bytes
SHA-256: c386afb4ed013aed607449ed6e94ffb950535c39a0442b7efcb29fd366ac37cd
font_02_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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