Malicious PDF — malware analysis report

Static analysis result for SHA-256 a614f845c9aa4e87…

MALICIOUS

PDF

75.9 KB Created: 2021-05-18 06:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6357fd1e268e80d7bb437ab59029db3b SHA-1: 807c334b6e6a8494c613079f0abb2616a5eb3996 SHA-256: a614f845c9aa4e87f167708ea634f6f64e29e24bb3f0213df406483934f0c256
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=volume+of+prisms+cylinders+and+cones+worksheet PDF link annotation
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/jufigubakeginibud.pdfIn PDF document text
    • https://kunizemofowirux.weebly.com/uploads/1/3/4/3/134311671/7273682.pdfIn PDF document text
    • https://lezewetamijes.weebly.com/uploads/1/3/4/3/134314200/lojukimij.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/6750639.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/4a9266ce.pdfIn PDF document text
    • https://nasiposeki.weebly.com/uploads/1/3/4/7/134709897/89e73f6953731b.pdfIn PDF document text
    • https://vusowosunuk.weebly.com/uploads/1/3/5/9/135975823/0474f5cd375.pdfIn PDF document text
    • https://tajaxaxiko.weebly.com/uploads/1/3/0/9/130969751/9b421.pdfIn PDF document text
    • https://lozuninusagutog.weebly.com/uploads/1/3/5/3/135309735/nozex.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/5265582.pdfIn PDF document text
    • https://wusukinepazewa.weebly.com/uploads/1/3/4/3/134372908/9192676.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/gasotorunuvunel.pdfIn PDF document text
    • https://xawawamofolapus.weebly.com/uploads/1/3/1/4/131436997/rukogugedewuwi.pdfIn PDF document text
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/raruseme.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/lomiwexuva/twin_platform_bed_with_6_drawers.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/instagram_tool_page.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/29644572088.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/where_can_i_get_my_jeep_serviced.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 5500 bytes
SHA-256: 333addac80d832869c8ee7b75aa175910c8aafb5a1336e2c98bba37f60107c31
font_01_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 10560 bytes
SHA-256: cbd0e86b271605e3e85ef76239a1830c15344d4afab0a5f35e44958530de8685
font_02_sfnt_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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