Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa30d7243c9f06f…

MALICIOUS

PDF

82.6 KB Created: 2020-11-11 18:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf0f7e61784fac55f826980d2ceaf41e SHA-1: 20760ec14f786f3f5cc79ce31c4bde746a37424b SHA-256: aaa30d7243c9f06f7c9af3d2b582a24ff19561ba3774bed82af1877584c64d97
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=angielski+w+t%25C5%2582umaczeniach+business+pdf In PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/zikufajoz-nasemej-jomebanawu.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/b2729c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/814dd7fc-7b20-4aaa-9488-c62a663626e6/xorub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4acbfdd-455c-4ca9-aa80-85d7c57715f1/92775086833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c6cbec4-63da-46b5-9316-f61d4abd81d2/25741969518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14d8b20-d788-4b74-92a8-2b632e23fdf7/30353963463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052834b5-6279-45c8-8a83-e86b0ce3b7c4/intolerancia_hereditaria_a_la_fructosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d50caf5-68b4-415c-a908-ed7777eadd0a/msu_graduation_may_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548bed62-72c5-449c-83a3-1e135dc7807d/60682932726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35f49ef-3985-4ce7-ad66-f150731f751f/fabregues_meteociel_gfs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f0aaaf-070c-4247-9d26-9bada32669af/dinolukanaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f3142a-42b0-4734-8fdb-3c573d0675cf/bloodstained_dark_matter_eat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf5f459-a553-4627-845e-98d0575f93f1/80343566828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3a80a9-ae01-4a94-9ec7-0697d34ca276/zuxojeberufumuputufeweri.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/atoms_and_molecules_class_9_worksheet_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE92 15440 bytes
SHA-256: 9f282f116df6a4dd70de4d7946c97e4d0f3dc5dc9976c29f84d9fb59cbcf554c
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 5864 bytes
SHA-256: 2ddebd13c44a4de50abe28581c096dd7e2b45d4fa40cf6ffa84833f99db2780e
font_02_sfnt_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 11828 bytes
SHA-256: 7a8c9357e3deef7c931dda6bf0b0a1a8d574e0d611a29824693ffd1dc156812c

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