Malicious PDF — malware analysis report

Static analysis result for SHA-256 780b082dc0708e6a…

MALICIOUS

PDF

85.0 KB Created: 2021-03-10 17:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1ec27a3ea273c23ad1b9018f24681c10 SHA-1: 9400ff03b67d4eba4ea573a059caded4abdd9d36 SHA-256: 780b082dc0708e6ace797f279deb7f36fcd5892c30ff9b9d90059d581e08eca1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=adjectives+worksheets+for+class+6+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409819/normal_603eabc9574dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375080/normal_5fdf7a5ebca9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fd1a2de8bc56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_60166e755067b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_60418d0316d27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5febee617b609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530712/normal_6046775ddfd9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5fe89ce1845fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415526/normal_6015aa1ac0380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495846/normal_6010fa749b310.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/legipalofi/80671074375.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/rorijowezuvamijuxoxaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff78167-3d61-474d-ac28-9d6bdd294a9c/xogibalini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cecede0-e317-4dc1-b6ae-beb0145083d1/jilewaretaja.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/36447214097.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/ap_stylebook_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/20409717908.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/cloudformation_template_conditions.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/79199903021.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/74306232781.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 5680 bytes
SHA-256: be859e6b9b1ee12a327da3af761b54a0f14cc80eb42826021f31e95949a43568
font_01_sfnt_off00010d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D61 10560 bytes
SHA-256: 2012d92af7129fd387689f89d72d92b555527484f9cf4e257cacb19b3ff9f6c0
font_02_sfnt_off00013132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13132 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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