Malicious PDF — malware analysis report

Static analysis result for SHA-256 db46071a516ab4c2…

MALICIOUS

PDF

70.8 KB Created: 2020-11-10 12:29:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dc2925fb4f502b53f5ea1aad7b4a6182 SHA-1: 155076829e391d322cf7fb4943376570821cdc95 SHA-256: db46071a516ab4c22c888d01305096a4ab68dc12cec0ad27aa9961fc6f0574e4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are to benign-looking PDFs, but one key URL points to a suspicious domain. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution via the linked URL.

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/123?keyword=manual+for+troy-bilt+pony+tiller PDF link annotation
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/485a3bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f892ea263f37.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/9f6c00f5-b4b3-4058-ab99-011727abfea3/binidolibotobegel.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/jekaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34899a47-bb0a-4442-aab1-87c831fe1e42/xonofunigukelanajejewexip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1050c50-50fa-450a-a0cc-27be0b5dca3b/exercice_corrig_diagramme_de_pert_et_gantt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd86a9f-10c8-401f-95c4-32cbfa487dff/rijarirasadudepisok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa23ab0-a9f0-4f1b-9770-8ca49cc8a18c/navewodosejamepofupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eeaf184-3fc9-40ea-b270-b9a11b60fd8e/xisutetukiwuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c53f73-870c-4a8f-94f6-c855fca6d8b9/13639958058.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/hunger_games_2_file_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/stoker_biochemistry_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/82561523087.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000d67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 4996 bytes
SHA-256: 89be264b9c0c523b28580e0063e621c962ef9ff33d18eb6ddd60794ba2cf8747
font_02_sfnt_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 11448 bytes
SHA-256: c3c227ebbca5be9fe61ed85d52248020ed438a5e09e207bbb402dee62bd60f12

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