Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d3a1166f361cf9…

MALICIOUS

PDF

89.5 KB Created: 2021-03-17 17:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 824cd163c2a9c9fb3021f9b606332825 SHA-1: adec75e46645e1d03108183b2ac07fb249637ed6 SHA-256: f2d3a1166f361cf95d4adf01e1363e624b2197d59eb704fea5f6f14b0174396e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect the user to malicious content.

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 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://lozipotod.ru/award?keyword=philadelphia+airport+terminal+map+pdf PDF link annotation
    • http://vipadminler.org/52330149224awni5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_600d5723ab391.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/gasubisevuwuzanad.pdfIn PDF document text
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/21689e6.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/74774881947.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/76998582256.pdfIn PDF document text
    • http://sosed.market/informal_letter_address_sampledbhab.pdfIn PDF document text
    • http://bahis-sikayet.com/what_town_is_little_house_on_the_prairiepoa9g.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/4b3a99f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_6011ec4e42e15.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/34440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_6043b776bd302.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/paxuvagal/best_custom_rom_site.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/91401465743.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/solutions_2_go_louisville_ky_sams_club.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/lazuwiwigi.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/nirifelomifototej.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/powarivapusidasafewoxoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/xowibatigodekifigad.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_off00011fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 5104 bytes
SHA-256: 59da13325c05d0d935bc92af5304fab85aff86bfd587a4dba98debe3adea24eb
font_01_sfnt_off000130f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F6 12256 bytes
SHA-256: 85b4e941145820872d6d9b0f74d757c38b40a829284771a423cd475698eddbf5

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