Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a6dc98c5560df2…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 12:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3478cd346d2264bdd4775c1cc6f6eaea SHA-1: 21d2a5186c89654692e8e9c0212f186ae2cd1dad SHA-256: 73a6dc98c5560df28687f7f6e44b91bbe9b63b806240254a3f23e3fa94956848
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=trees+with+shallow+roots+in+australia PDF link annotation
    • http://shishkin-seed.xyz/8348440199993rmk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_60010333a6557.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/marshall_haze_40_specifications.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5ff3016b58942.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/blumer_1969_symbolic_interactionism.pdfIn PDF document text
    • http://basiditdcf.space/charitable_donations_2018_form9x0dm.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/patotale/burlesque_movie_soundtrack_free.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_1ec23b18bf8443faad357d335b6a6906.pdf?index=trueIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/20425526354.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_e1ac37940de24177b912cf14142343bc.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_a1cbf65177fa4677b056f43543094ff3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/62690996361.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/39514058236.pdfIn PDF document text
    • http://givotirufo.rf.gd/antrenman_geometri_2.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_8cfeaa87e683495383faba2a13c38ff8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ninasivol/linearlayout_border_radius_android.pdfIn PDF document text
    • http://lazunebenak.epizy.com/89947610232.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/define_organisational_behaviour.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_ef6650da4a79436eb63a7c42fc9952be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomepixo/3859347031.pdfIn PDF document text
    • http://virujafaxamer.epizy.com/lysol_disinfectant_sds_sheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 4816 bytes
SHA-256: 4afe0ef7f0c1cbbaed3b00c5d6af4f10a370e964e26fffbefe404220cb55dfdf
font_01_sfnt_off00010977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10977 10292 bytes
SHA-256: 70eec7d26bd7432b3a6267fe51bad8e3aae86c2db5e99f28d44a31e3a87a6cb6

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