Malicious PDF — malware analysis report

Static analysis result for SHA-256 80415f422eefeded…

MALICIOUS

PDF

78.8 KB Created: 2021-02-04 04:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 01d794d2737fb585d1198571ced865ae SHA-1: f4d31328eff4477990290ff9328820a6f328e036 SHA-256: 80415f422eefededac6173981b64d5f665d21998b4a3d0208cff0fd8e014101e
166 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains multiple suspicious links, with one specifically highlighted as an invisible link to a suspicious domain, likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jottigo.ru/aws?utm_term=friday+the+13th+part+6+parents+guide PDF link annotation
    • https://sapuzexa.weebly.com/uploads/1/3/5/3/135348006/acc7385.pdfIn PDF document text
    • http://bachanalytics.com/identifying_sentence_errors_exercises_with_answerscftgp.pdfIn PDF document text
    • http://gprofights.ru/cocina_prehispanica_arqueologia_mexicanah06ue.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/qHMxfji/wakuwikurime.pdfIn PDF document text
    • https://vagobodowi.weebly.com/uploads/1/3/4/6/134600101/53038adc5d29e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412181/normal_6007f0151f2f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5ffe628001698.pdfIn PDF document text
    • http://joy-todays.online/solar_system_formation_the_planets_colorsxea13.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/dofibiti-rifidapokutajo-muxuwopegokoma-vixinefolevurid.pdfIn PDF document text
    • http://kyhni.site/rufezixepagoguvixalijedri5o.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/6yYfuqP/58331082254.pdfIn PDF document text
    • http://afracheat3.xyz/history_of_west_african_slave_tradezhh13.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/44238912604pc4yg.pdfIn PDF document text
    • http://triple-doska6.club/strung_along_quotes88s7y.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/iherYuW/xadatalijasowebelutur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokobunowome.epizy.com/aclaraciones_banamex_formato.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_off0000f78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 5616 bytes
SHA-256: 3539d59504f59aadec785cda78d5ca2bd491e44c580d19d4532aeb2801966adc
font_01_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 10308 bytes
SHA-256: 48f9c94f45f8401a49d6b399cb1f94558652ef66620ef2a2c54451ae4ba693fa

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