Malicious PDF — malware analysis report

Static analysis result for SHA-256 9725d1e6cb70431e…

MALICIOUS

PDF

73.1 KB Created: 2020-11-14 13:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b9ea923b118113cbcd46a4030fcaee5d SHA-1: b7e50dfa24b13b734299be1fa79d2fbde8149dee SHA-256: 9725d1e6cb70431e1fa1c655e23d61cd1fb67163ac9f766947a9eef1208f1d63
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=force+and+destiny+knights+of+fate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fa0ff9f413ad.pdfIn PDF document text
    • https://saloramorolo.weebly.com/uploads/1/3/4/3/134307331/9833858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5faf2eadaa302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f94b43fa09cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404497/normal_5fa4008fa3d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f933401ee0e6.pdfIn PDF document text
    • https://ribafiligizeki.weebly.com/uploads/1/3/1/4/131438260/749680.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://uploads.strikinglycdn.com/files/63addcb9-c421-4daf-a05b-fa90ee781e0d/fusiwifal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88424199-341f-4543-9c11-f4861e31cce4/49822777897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe525928-1562-4809-9e4c-cdf56740158c/diffusion_and_osmosis_worksheet_7th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17605642-eca7-4a01-8413-ca88f542d86a/4930553551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9526fea7-a451-428d-be63-89463e5c6eb4/35531292415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3f66b2-fa19-494a-bffc-19b8dce53d26/48634867310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc0f1ef-152a-48bc-a6ff-583a4e47fd82/twitter_create_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6928c971-7a2b-45ff-9531-e4922676bfad/1185979026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc86f76-a0dd-4ff3-bd0b-ea4df5ad2078/toileting_self_care_deficit_nursing_care_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f780a93-2db5-46dd-89bc-5ae37b6fc537/68355749735.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_off0000d259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD259 5160 bytes
SHA-256: bb410869ea41bd77ae0b1a522a0ecdf6f281d7008e2be46130d797339db2f87e
font_01_sfnt_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 11200 bytes
SHA-256: 7abbecce5a300912f0a6399f34caa1f6a96e8896f6df4d30572612935f998fc6
font_02_sfnt_off00010909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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