Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda6cfedb2ba3caa…

MALICIOUS

PDF

72.3 KB Created: 2020-11-11 02:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5a640d0baa804cfa1c740b02e90e21c SHA-1: 58bd593b1d6db384e797833d02914567b3b9b7b7 SHA-256: dda6cfedb2ba3caa872bb3ff43250f34855b18dfeb298449d576f3ac93f29af9
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffnew.ru/123?keyword=fairdale+high+school+alumni', suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of malicious activity, likely involving redirection to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?keyword=fairdale+high+school+alumni
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/jogidop-zufokasugasefu.pdf
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5f8e99edb81ff.pdf
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/xasagibufa.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/5842945.pdf
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f92fb04c00ce.pdf
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/febuzelata-zavaxi-reregu-narixa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6ea152b0-54c0-404b-a03e-623178024bde/75943300113.pdf
    • https://uploads.strikinglycdn.com/files/90dc476f-5f34-4d8b-bbdc-3e3f3fd8c291/gogolijofuwep.pdf
    • https://s3.amazonaws.com/tetofamuxulil/asp.net_tutorial_by_kudvenkat.pdf
    • https://uploads.strikinglycdn.com/files/496a899f-8e91-408b-95be-fc1d0ce21c29/74495781871.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad5.bin
15d1e35de802992eda914af044f2e68a3d5c93cad5a1cd9ac3abdfe7d325f031		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 5308 bytes
font_01_sfnt_off0000ecb9.bin
85def39f30d1c86691da5e81003c97309ba00995efc2c9e1f2ecc91e9bf24c77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 11224 bytes

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