Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f08cb6cbaa83450…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 00:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 05512058e54716ba963f75de2b4880bf SHA-1: e8cfe4cd9151462f7eaa2eaa40d68a33ad73f056 SHA-256: 8f08cb6cbaa83450169c8c36c9871fee23ddd5571e350cb9cb6c90b4f42b2bb7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 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.
  • 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://pelibifir.ru/award?keyword=livro+piscicultura+de+agua+doce+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388406/normal_5ff5c33b304fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_60157fc855abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470526/normal_604625ca02f3d.pdfIn PDF document text
    • https://vubopedu.weebly.com/uploads/1/3/6/0/136083963/4842986.pdfIn PDF document text
    • https://wovukevaz.weebly.com/uploads/1/3/4/5/134523328/pipatajarike.pdfIn PDF document text
    • http://rejonozafazimut.22web.org/ethnic_conflict_definition.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/3c2a74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/numegubowalonan/gopesejaledarudatilejed.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_25d7c04b4bcc4da59a8afeb346ab4f01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/bhai_movie_songs_musicbadshah.pdfIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_c727787ea92442f299682c82902dcba0.pdf?index=trueIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_48261b3bf525465d849e328a4210a7a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/enlil_vertical_axis_wind_turbine.pdfIn PDF document text
    • http://vuzabog.epizy.com/gelozuvinufotezapelevofa.pdfIn PDF document text
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_0b7a8dc680264c71af36d39eb120517e.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_72069c6f636f416a8c6672b76d9d3c30.pdf?index=trueIn PDF document text
    • http://furizebun.epizy.com/zomakaf.pdfIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_13b14683190744b5907e4d7b9ccdedfc.pdf?index=trueIn PDF document text
    • http://fugexumelelada.rf.gd/78766424467.pdfIn PDF document text
    • http://jozizirepimetel.rf.gd/27593355068.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/sadununedi.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_9b2475794b8f4ff198ecedb60bce9560.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_4b504c625d4941b5ac6122fcd40ab285.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_f02dc19f997a42eb855ad36a08ee6fe6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xetasif/zexekesoxejunuriruto.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_5ee28cdf0a544411a354c85b006a241c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 5100 bytes
SHA-256: 10890bc008a710ebc7f3fc137fc59da0c92d673a2a960547602e6f731a04819c
font_01_sfnt_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 12144 bytes
SHA-256: bfa01a3f282ed3d82d089d09541ee32711273bce1b89f05b8fc5fc6de9d1f87e
font_02_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3