Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3746bb22a3ea0e6…

MALICIOUS

PDF

74.8 KB Created: 2021-01-02 13:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 379efd3b59392329f79d3362752e1860 SHA-1: b344f1861ff670ce0365c61d850b28eefe0a9f63 SHA-256: a3746bb22a3ea0e691750964db2a298a50ce5475c62fabd7d98989ea1fb5f848
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware delivery attempt. It contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm or SEO manipulation scheme. The document body is heavily obfuscated and contains what appears to be junk data, further suggesting malicious intent.

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?utm_term=what+you+know+two+door+cinema+club+bass+tab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476133/normal_5fdbdebba8dc0.pdfIn PDF document text
    • https://cdn.sqhk.co/renapudovi/ia7uihb/27367852160.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/gcqhj2E/island_of_adventure_height_requirements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f89d7da3909e.pdfIn PDF document text
    • https://nojefawagalubab.weebly.com/uploads/1/3/4/2/134266261/kekawovisukotuma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab24053-ebc3-4031-9f70-fff67e0ca6dc/puparusojumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11197f6b-79ca-46bb-a07a-a6f47456f104/8833056202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847a1f9d-4097-43b1-a089-7013f1430e2f/60901720906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb1c527-644f-417c-8cfa-29fb14677eab/besetukejevodopemifowone.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/baixar_jogos_para_android_4._0._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f1097e-beaf-48cf-8691-b81f41775691/67719977558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9aee53-821f-4ae5-9814-d2f28d563ac9/leluruzed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c665d1-8d1a-435f-b03c-24e13db72f3b/55236451768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cb85ee-1d13-4ed0-b8c0-d8f5f0f3aa5a/bofagekibexo.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DF 5592 bytes
SHA-256: f1311a5d06a442603be504c5935cebf915567917d599a25696a5c4166b40d2f6
font_01_sfnt_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 12552 bytes
SHA-256: d0133f2bb2f9e9e6156cad1a2d6a41b1fd2d9af290b91334722884fe66758593
font_02_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 10500 bytes
SHA-256: dc4b103a8e5f3aad57d57254041c1b6cc4fc72e340a02a63102d4531c454c867

Open this report in the interactive analyzer, or submit your own file for analysis.