Malicious PDF — malware analysis report

Static analysis result for SHA-256 b209eaaf90ccb5e9…

MALICIOUS

PDF

121.3 KB Created: 2021-04-07 13:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bc31696a8468adc121016d9c83d4ff63 SHA-1: 8ef37d01fe79e1703caad650ab4d353b546477b0 SHA-256: b209eaaf90ccb5e9f8f1931566e7b9655f24213e32fc0311e379bd0ed796e333
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains a high density of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, mentions "Amazon gift codes generator", a common lure for phishing scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dugedepap.ru/wix?keyword=amazon+gift+codes+generator+v2.15 PDF link annotation
    • http://kulotufiw.mypressonline.com/39017637001.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/hhdghjd/advanced_sword_mod_minecraft_pe.pdfIn PDF document text
    • http://zejizeb.22web.org/35925494957.pdfIn PDF document text
    • http://znalomstvavip.site/mediasonic_probox_hf2-su3s2_firmwarentq0o.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/jf5ibgi/wind_waker_hero_mode_tips.pdfIn PDF document text
    • http://paksorond.xyz/baldur_gate_dark_alliance_2_workshop_guideu2spq.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/vajutiwavopaxa.pdfIn PDF document text
    • http://pabulaluxe.iblogger.org/ragulosifudowudaf.pdfIn PDF document text
    • http://kraftmann.su/diccionario_biblico_strong_en_espaol_gratisv0jaz.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/menora-joxodudivolir.pdfIn PDF document text
    • http://rubyshup.space/87707452192wr8j1.pdfIn PDF document text
    • http://midimox.getenjoyment.net/narrative_of_the_life_of_frederick_douglass_sparknotes_chapter_7.pdfIn PDF document text
    • https://dirukarizudabi.weebly.com/uploads/1/3/2/3/132303081/kovaxunavo-rezep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuvuwase.rf.gd/english_french_german_dictionary.pdfIn PDF document text
    • http://tejademadubo.rf.gd/15055905323.pdfIn PDF document text
    • http://jifunujori.rf.gd/adverbs_of_time_worksheet_grade_5.pdfIn PDF document text
    • http://tebuvarajeba.epizy.com/factors_affecting_geometric_design_of_highway.pdfIn PDF document text
    • http://konajif.epizy.com/pefinimakitaf.pdfIn PDF document text
    • http://suvumudupese.epizy.com/burns_sensitive_dog_food_feeding_guide.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_off00019956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19956 5748 bytes
SHA-256: b7f964c5a6a4f25f62b7ae995d1163a490ed928636fc621b6cf28f691d0ad8ee
font_01_sfnt_off0001acf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACF8 12780 bytes
SHA-256: a1b1ee84200b33035a759a62b72dcf0257783920b6791ef96f24e6fbd76dbee4

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