Malicious PDF — malware analysis report

Static analysis result for SHA-256 907ffd46a6c3cdd7…

MALICIOUS

PDF

78.2 KB Created: 2021-04-15 03:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5c29753b2ded4df074f2be0b126d257e SHA-1: 524c1842ee25aaf37e9019323adf80ae5f6c79df SHA-256: 907ffd46a6c3cdd776ef55ec251cddbb06a72f0f814546259f02c39c888f748b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. The document body, though heavily obfuscated, contains text related to software serial numbers, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://seumenha.ru/strik?utm_term=how+to+find+serial+number+for+adobe+acrobat+9+pro PDF link annotation
    • https://cdn.sqhk.co/wipabamof/icQzjc0/14428214416.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/5ap4u5i/exorbitant_person_in_a_sentence.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/1000_palabras_basicas_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/RSighdI/human_centipede_movie_scenes.pdfIn PDF document text
    • http://cyberlife.store/30095247969b64cc.pdfIn PDF document text
    • http://wakekuluma.iblogger.org/reeds_vol_4_naval_architecture_for_marine_engineers.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/icgfEhj/22096933421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_604edee6b5a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_602c2e8d4d569.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456989/normal_5fecf02825f7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5fed14ee10388.pdfIn PDF document text
    • http://livethailand.fun/351206248825i2qv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fcf8c67e9ab1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480893/normal_5ff1f265e31ed.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/wusod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_6066ff4711a21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382418/normal_5fee6f988f363.pdfIn PDF document text
    • http://tryraisins.pro/word_families_worksheets_for_adultsv4gs8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_606862a1b5ff0.pdfIn PDF document text
    • https://cdn.sqhk.co/forebebeke/iigge9Z/85625097782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojufuka.atwebpages.com/el_desafo_del_amor_40_das_pelcula_completa.pdfIn PDF document text
    • http://pexevogawi.epizy.com/64494852243.pdfIn PDF document text
    • http://mikozigejeti.rf.gd/external_speakers_not_working_on_dell_computer.pdfIn PDF document text
    • http://muteperuraku.rf.gd/english_synonyms_dictionary_free_download.pdfIn PDF document text
    • http://difiwawi.epizy.com/bafijisivuwage.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_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 5652 bytes
SHA-256: cac657a79159dd030683b88281475c34f0708473401cb0c1046bd59688dd703d
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 10972 bytes
SHA-256: 44f382dbe6101cf66b7624b797b80381aca8a9cd24742c6d678f6d94f73ad161

Open this report in the interactive analyzer, or submit your own file for analysis.