Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56747429ca5aff9…

MALICIOUS

PDF

76.7 KB Created: 2021-02-28 21:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 17883852f91a0e0adeb0c1a4ea054551 SHA-1: 567433a54f6e8eaadf0c1f97b774ef52ce2ba215 SHA-256: a56747429ca5aff918402b68e33a54834a687a065f3ffa00b5bd872b9fc05944
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=dragon+age+inquisition+patron+of+the+arts+bug PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370062/normal_5ff933b3addb2.pdfIn PDF document text
    • https://vufofameti.weebly.com/uploads/1/3/0/8/130874118/5313256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5fe0a7d59d4c9.pdfIn PDF document text
    • https://nuvaxavixo.weebly.com/uploads/1/3/0/7/130738964/solezopusus_dobulizika_nurokufaveposof_firenilisig.pdfIn PDF document text
    • http://7lessons.website/bosch_silence_plus_44_dba_reset_buttonioook.pdfIn PDF document text
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/6716849.pdfIn PDF document text
    • http://arm-watch3.club/rigagavsrk3p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385014/normal_5ffe17a62c5df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375894/normal_5fcba77a2dfed.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/nojeziletesabon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_5ff113801c0a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464068/normal_5fdf734af1c46.pdfIn PDF document text
    • https://sanejivuzagegu.weebly.com/uploads/1/3/2/7/132740711/junubexum.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/c83d71c1ba46e7a.pdfIn PDF document text
    • https://topudikuwem.weebly.com/uploads/1/3/4/0/134042537/fikotujavefujotizir.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/85409510192.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/gazarasi.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/891428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5fe9b78c6350e.pdfIn PDF document text
    • http://oneshops.space/94263805626xwz9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376600/normal_6000f86a8c850.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 5396 bytes
SHA-256: 930840a52002e908172a498933cef9a400a4e389f400d57c1f6c6d4370e95e71
font_01_sfnt_off00010177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 10528 bytes
SHA-256: 5c6d03039569ebdec82a7ee25162be82da7b40623aa13f30398b92b150a85c71

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