Malicious PDF — malware analysis report

Static analysis result for SHA-256 2908403989b72b3e…

MALICIOUS

PDF

77.6 KB Created: 2020-11-10 08:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e49ec0baee33518628c805ef54f355 SHA-1: d0f3ea4b17f5af947504f6faf7a98c7cb709ec4f SHA-256: 2908403989b72b3e3149ebedb94f61625e1004eef9a195dd3c6d6a1f0376e86c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to a 'dictionary'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/aws?keyword=d+d+infernal+language+dictionary
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f89bfcb68f24.pdf
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f885fbff3cd4.pdf
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5fa0e8525593c.pdf
    • https://jisogixisizula.weebly.com/uploads/1/3/4/3/134328009/1861238.pdf
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f9d56b84ed18.pdf
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/sukufoweton-xapefiza-zakipagopap-gogirekepox.pdf
    • https://fexemefamerera.weebly.com/uploads/1/3/4/2/134236105/jekami-widomikirawobat-damejakinonate-simapodulepur.pdf
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/mumuvuf.pdf
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fa8a0167408c.pdf
    • https://kipujoguburaza.weebly.com/uploads/1/3/4/3/134321983/fiwixafebowul_navapumufafetaw.pdf
    • https://cdn-cms.f-static.net/uploads/4425211/normal_5fa8bc1165f55.pdf
    • https://cdn-cms.f-static.net/uploads/4492593/normal_5faa0a6580017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/mejawiwomak/potter_county_warrants_texas.pdf
    • https://s3.amazonaws.com/sivanira/54061336779.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf94.bin
da301c3c03ca877039ccada060b63f965a9e19885fe16779196b2baa543d62b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF94 4992 bytes
font_01_sfnt_off0000e0a2.bin
7c0ee85e62d97076fadb6497501fb1141e226d5edc1eff5bb696044b064675c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 10584 bytes
font_02_sfnt_off00010502.bin
f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 16344 bytes
font_03_sfnt_off00011a7b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 4324 bytes

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