Malicious PDF — malware analysis report

Static analysis result for SHA-256 926aa71960b383c6…

MALICIOUS

PDF

85.7 KB Created: 2021-02-14 07:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9b4b6ccfe914b8dbc96ba93dfef4277b SHA-1: 6c88708dd8acfe19e4c3965c3403b2dcf3c14600 SHA-256: 926aa71960b383c6e6433c9486b2c6ae4d8de7321bf81ad09701f14875a21cda
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that masquerades as a worksheet, likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to potentially harmful content.

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://leonvi.ru/wix?keyword=combining+like+terms+worksheet+pdf+6th+grade PDF link annotation
    • https://cdn.sqhk.co/xixumobun/mALe5hi/king_s_raid_ishi_wo_tsugumono-_tachi_crunchyroll.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476927/normal_5ffd9fc760a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6023ff1b7d640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_5fd31a6d13573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385847/normal_60098e3e9dee7.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/zBSghNv/zawukumerozapuli.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/i4X7Vge/26797463833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480382/normal_5fd0318e061c8.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/jYhdnha/meninozutepowosubaji.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/icPMjcd/94871165240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476421/normal_60076d014a22e.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/fefurorobumi/je_vous_informerai_traduction_anglais.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/apple_corp_email_format.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 5716 bytes
SHA-256: 7884d26cdca6bc5743c0c127ce4a6195ea58aa169326ed4ada80c6701b064ca4
font_01_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 10704 bytes
SHA-256: aa007c7d06326b24e696f48f8d6a5a47d5f7fcd076fcc5655939dd497af238ad
font_02_sfnt_off000124e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E5 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off000139ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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