Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f17f3097a752d8f…

MALICIOUS

PDF

65.1 KB Created: 2020-12-01 07:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a44de98d86a9a08b9f665483c3782035 SHA-1: dd9a547e251a34b84012b3f253f9ff94f4a50cf0 SHA-256: 9f17f3097a752d8f9e2ac5b75bf08caf93f93a472334ae07c99f17a35ddafc79
194 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/123?utm_term=3ds+memory+card+64gb PDF link annotation
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/3169130.pdfIn PDF document text
    • https://wovusowi.weebly.com/uploads/1/3/4/8/134886666/xeloxoje.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/norixerowiromemidu.pdfIn PDF document text
    • https://xezepumufemab.weebly.com/uploads/1/3/4/5/134589658/nofonu.pdfIn PDF document text
    • https://sopulekazixov.weebly.com/uploads/1/3/0/7/130776801/750ff21d97f.pdfIn PDF document text
    • https://sopodepewujo.weebly.com/uploads/1/3/4/3/134340903/7359231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f9fa529de3f4.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/e2fc595.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/jafujasiwetid/abc_data_sheet_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed9b244-01aa-4eba-92a4-aedc39afa5be/tawibavoradu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5a5729-c034-44c3-bb21-8f930737a925/red_brick_200a_esc_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ac781a-b6cb-42be-840b-22b7dab8725e/is_download_mode_the_same_as_fastboo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06d32a4-8084-41ec-a272-e87322e06147/rejabupolotabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b01db70-7cc3-48e7-8a2d-75f3c2358e8e/62441728826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f38ed4-d200-424f-966d-b6e996ae4eb0/peso_aparente_formula.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_off0000c09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC09A 5780 bytes
SHA-256: b6e66dcc5671d85e809c15775ec9844b4efed7e393ce12e9a12c25ebd40efb2d
font_01_sfnt_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 10460 bytes
SHA-256: 175257282f6f1735128374b5c7e876931b514fc1a80e4087d3dd095209e635f6

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