Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bd1cfcecf6edb8…

MALICIOUS

PDF

65.6 KB Created: 2020-12-22 15:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7ed32c3b156562da5980eaf2e6cca796 SHA-1: 9916c772339e1e71e601a1cefed472b450c31cf8 SHA-256: a6bd1cfcecf6edb864c43f5bfd468e8c75fd846769906234cdd0cf75f270d4e3
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, traffset.ru, which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains text related to graphing worksheets, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=coordinate+graphing+mystery+picture+worksheets PDF link annotation
    • https://dawopurasujup.weebly.com/uploads/1/3/0/7/130775219/kimuzatir.pdfIn PDF document text
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/5433993.pdfIn PDF document text
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/b0f80d11e63a2ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc13e7dd49dd12447366960/t/5fcf2ce464290b1c3dd1aec3/1607412964800/77589964737.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/30417748114.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/65105505313.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/43260804466.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/ted_l_nancy_books.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf0cf2d131352a6a8c66f3/t/5fd11fc78c49b64c3bc42abd/1607540688619/granny_mod_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee1d2b1d401545ae536d1/t/5fd73728491a58544a2bc764/1607939880420/baaghi_movie_bestwap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54772bdb33045eedf12bd/t/5fc691084f98375720c48b5a/1606848776525/33255675255.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72a5c9849b27a00a4f8bb/t/5fc8985a6031f4738623c284/1606981725194/latela.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/69388760005.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_off0000c3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C7 5616 bytes
SHA-256: 3fcc73a802378c8291aa8e409fccc2146fff10ec36612cc34d91fe1180f8e1af
font_01_sfnt_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 10092 bytes
SHA-256: c9e68641109a462ce84219518b9ba32bf9e18a3279c6c8102dee347d55618a2b

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