Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c08d4d96daea3e…

MALICIOUS

PDF

80.2 KB Created: 2021-03-01 10:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d4a5eceee2b0b949d2e5823d77fa22d2 SHA-1: 59793ad1bf1360c0831a88a10d8c4ccfc04373e1 SHA-256: 80c08d4d96daea3eab6cf92ec59ea682636aba3a721e433b62e867631c8ea84f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://zajinet.ru/strik?utm_term=adobe+premiere+elements+free+download PDF link annotation
    • http://siwupojotuj.getenjoyment.net/jatujoxaxulufi.pdfIn PDF document text
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/2646e6eb4385a.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/12335710139.pdfIn PDF document text
    • https://vosasavowaje.weebly.com/uploads/1/3/4/5/134587316/razobetijuj.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/5515433.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/14770241738.pdfIn PDF document text
    • https://rowigimafusapop.weebly.com/uploads/1/3/5/9/135982222/rovavukij-ratupekegeg-xasufatugezow-luxaded.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/what_does_time_and_space_mean_in_a_relationship.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/9351864202.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/bisazabe/factoring_by_grouping_questions_and_answers.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/how_to_remove_adt_panel_from_wall.pdfIn PDF document text
    • http://maxaluvobewog.epizy.com/bilayer_formation_vesicle.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/likelebozi.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/84005466140.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/interior_design_programs_canada_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/10689148393.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/11786837828.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_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 5196 bytes
SHA-256: 9398056b393b2930de75bb04ff353635998857ee1627d8dd8747c72a51c006a5
font_01_sfnt_off00010148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 10496 bytes
SHA-256: 83ee779a95d63336f108e9d4cc2545e4d6980d3de43ad8d17abdb700b4c09901
font_02_sfnt_off0001253b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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