Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7861d47f280d76d…

MALICIOUS

PDF

71.1 KB Created: 2021-01-03 04:27:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9f53c98a0bb5cd3b8dc225dd90913a20 SHA-1: 306084424eec88f7d7727c82d153123eef52f64b SHA-256: e7861d47f280d76d3a53ed5db3d980321162d20fb706b0471eaacb985e255a5b
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains elements suggesting a lure related to 'car accident news report example', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/aws?utm_term=car+accident+news+report+example PDF link annotation
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/917088.pdfIn PDF document text
    • https://nunifabemavi.weebly.com/uploads/1/3/4/8/134871907/5137653762dc.pdfIn PDF document text
    • https://rinajota.weebly.com/uploads/1/3/4/7/134714435/222386.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/nelim-dikelege-julatexobu-tosorivi.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/jedaxopopuko/84717135269.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/altova_xmlspy_2011_professional_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/expanding_horizons_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/tower_defense_android_2._3.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/xmanager_6_free_with_product_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/bosmere_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/5933561503.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_off0000d85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85C 5284 bytes
SHA-256: 5f71278f2c6a6ca9f7f47c2efe64471f41557d8f33c8f8175853c65aedae400a
font_01_sfnt_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 10928 bytes
SHA-256: 4d054fa5f014c8c02ea670e393ac2ed2cbf3315e7585a92387e207be935c3bda

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