Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bcc2ea32c43845…

MALICIOUS

PDF

68.6 KB Created: 2021-03-21 11:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c9199aec4fb04f9754dc1c884c1e32f4 SHA-1: 51b64e653b5d4a291501b9e2bf5836ded4f3fbc8 SHA-256: 30bcc2ea32c43845ea61c0f0fb95176123a2b856e177db26b82ec42192f2843c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://midufefew.ru/strik?utm_term=atwood+hydro+flame+furnace+sail+switch PDF link annotation
    • http://bodyita.space/tib_e_nabvi_in_urdu_mardana_taqatoojye.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/b25a8295cd3.pdfIn PDF document text
    • https://bufopavebusi.weebly.com/uploads/1/3/4/8/134853568/doxavusanosex_bevusafanaf_gepukonuwuji_kerugegunig.pdfIn PDF document text
    • http://biomaniix.website/xadizimawivajajelewiwuroczvqr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_5fe8ace65421a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_60246f436d85e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485436/normal_5ff7840593a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_603f64e6b9c73.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/65eeffac91dbc.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/52b9feb8.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/bodadiroboli.pdfIn PDF document text
    • http://flathead.us/fogizigatugulupigabunoso6ob32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_60241b27bbdca.pdfIn PDF document text
    • http://goossyy.online/autocad_2017_keygenv6vfk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_cf1b0529e8594d569f430071a574fd80.pdf?index=trueIn PDF document text
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_de121ee0d700467d87b8f4a3585b8a4c.pdf?index=trueIn PDF document text
    • http://sarutufasiko.atwebpages.com/kizofu.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/12649995178.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/how_to_clean_ge_profile_microwave_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/mutofedaxom.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/canteen_services.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_5c8f9e68810743c99e144868ab74b602.pdf?index=trueIn 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_off0000cd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 5444 bytes
SHA-256: 7798eaef05ee5df77bb3358ababd590286f79a03c165da5155c6d340e96fa48c
font_01_sfnt_off0000dfac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAC 10768 bytes
SHA-256: 41f3459d9247f362d1f1f10d92aeb406e49e2f6c13c515c574bcca862d1e320a

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