Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee57a9aa8f507873…

MALICIOUS

PDF

74.8 KB Created: 2021-03-04 02:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 567626cda88078cdf433b46c30cb5242 SHA-1: 59777f871356ee6ad975f6f95f3c5ff2bf42a558 SHA-256: ee57a9aa8f507873c9e01d4756009dd3a5fa74eeb08280eaab516c48f2b15433
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The embedded URL 'https://golowaki.ru/award?keyword=how+do+i+order+a+jitterbug+phone' further supports this, masquerading as a search result to entice clicks. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

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://golowaki.ru/award?keyword=how+do+i+order+a+jitterbug+phone PDF link annotation
    • https://cdn.sqhk.co/norifasil/jfijhgK/15887027803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464700/normal_601d7a1596f38.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/luvexoko.pdfIn PDF document text
    • https://kenafidoragakox.weebly.com/uploads/1/3/1/8/131856022/pitalolutapulenibo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500189/normal_5ff20a6765cff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5ffbeab84a818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5ffa30a028970.pdfIn PDF document text
    • https://pojikajuruwasi.weebly.com/uploads/1/3/2/6/132695468/lupazipagijukinazisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401723/normal_5ffff8333ad6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_60332681118ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392452/normal_5fe2f104a6ad8.pdfIn PDF document text
    • https://rixemovupel.weebly.com/uploads/1/3/1/6/131606965/nadomubibijuruku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fdb170330e39.pdfIn PDF document text
    • https://tusozokusex.weebly.com/uploads/1/3/4/6/134678333/8857119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mupelaj.rf.gd/jevivekofegibo.pdfIn PDF document text
    • http://gakowutegufez.rf.gd/87858523025.pdfIn PDF document text
    • http://kaderuzaxaje.rf.gd/kupurigunega.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_off0000e7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 5280 bytes
SHA-256: 09fff578fa2645c5fc8429868e4d164ba85ae78677fb994051c84c223a5ee092
font_01_sfnt_off0000f9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 10660 bytes
SHA-256: ffde4de16561189b1815b229aa9d9656864dbe1baec108e8854ef3e1c0c7e7eb

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