Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4cf30cd8cca871…

MALICIOUS

PDF

79.1 KB Created: 2021-05-26 18:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f663b54f6bd249478e2beafe7dcb25bc SHA-1: 86f27657bc48ddeba3beb68cd23c5a9c1fa8d091 SHA-256: 2f4cf30cd8cca87107877210d65ba88e0a81d1afbe956bae62ee70ac463f4454
164 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 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=abbyy+finereader+14+serial+key+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fdd74df4a23a.pdfIn PDF document text
    • https://gumulopeviw.weebly.com/uploads/1/3/5/3/135348062/velobo_tutifepoderasu_vetigiril.pdfIn PDF document text
    • https://winomawapaba.weebly.com/uploads/1/3/5/3/135334931/2572551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_600c530a8ae62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5ffc039639e67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_60695c1181fb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481516/normal_5fd0593e0355c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_60131445d8c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499633/normal_6026fe7de2abb.pdfIn PDF document text
    • https://gebotela.weebly.com/uploads/1/3/4/3/134318039/1335951.pdfIn PDF document text
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/5576627.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/b96654c1-792f-438d-97e7-76d1a3e45770/33774086625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b20704-124a-44bb-aba6-068d0981c4cc/98941793015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca5fd49-c4ba-452e-95c2-ea115a27d06a/sisugejenezexojorutedab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a907e0a6-06d1-4d94-86e1-7040c32ebcc7/86810413883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63a2d82-e7fc-453d-b0f4-9bab4bc6e27e/70774665898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/288102a3-e3b5-4dad-a002-73512edeb33a/does_bleaching_cream_work_on_scars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac18728-8e5e-4877-9293-aa4f786e0df3/standard_of_excellence_jazz_ensemble_method_recordings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7df065a-57d1-42a4-b6a5-05a835cbf990/jisonumuwavalukipij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fdaa8f-1f39-407c-8857-844dfa339d54/the_story_of_philosophy_1926.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_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 5428 bytes
SHA-256: 380789f2232e18d7f9ba48a180af22d0aed86855aa427c769e2c4eeb46551301
font_01_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 11100 bytes
SHA-256: 17201293a6a7bd6c3348509b560538e2dbe13e9cf1baa8972e6826a9f1da6dda

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