Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c471533bab370e8…

MALICIOUS

PDF

76.0 KB Created: 2021-03-16 03:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3d5c676d6e3e591be1ca6cc019779cee SHA-1: ad29984f3717b7d38bf191ac574924f08418bab9 SHA-256: 7c471533bab370e875f1b0bf9988b7e32bed0863a771659ce7e7ed419cd98c8c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=nice+dragons+finish+last+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392218/normal_604dab644d4ba.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/oXif7QV/angry_birds_transformers_telepods_toys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5feb5d3f80725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_6015bea716b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_60226ee7b94de.pdfIn PDF document text
    • http://heleogose.online/91848435342rfzv5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367927/normal_5ff9ddf2ee993.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/dU0Mqjb/trivia_crack_cheats_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/idJ6Rgh/delibuvunaxizimajagike.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/cghNZhc/63160481687.pdfIn PDF document text
    • http://outputqwvk.space/attestation_employeur_pole_emploi_remplissabler48cs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487918/normal_5fe29305ed6e6.pdfIn PDF document text
    • http://goodshopsales.xyz/setapokijifunenezige413ex.pdfIn PDF document text
    • http://milanbeach.fun/499301815132pv4x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369930/normal_5fcc55c4f0766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_604ddd825a4f5.pdfIn PDF document text
    • http://reestr.site/juraxarumiezmtk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_60425fe265ae4.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/jiwotarotavuz/glock_19_gen_4_trigger_housing_pin_removal.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/68716282971.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/95085290940.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bachna_ae_haseeno_songs_musicbadshah.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_off0000ec04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC04 5388 bytes
SHA-256: 272225ca5f310adcb35d3161845d19d79969333f58ea82843c3f052ea30e9d75
font_01_sfnt_off0000fe58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 10628 bytes
SHA-256: 09a7d357e2fbf915e151f37bcb3ec994b0bfe76eb63a0dcc36502051b350128b

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