Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1e40be8538f34a…

MALICIOUS

PDF

80.8 KB Created: 2020-12-29 18:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0e9207253f5956fd2671465a948dee57 SHA-1: e1d76791d3ed05e10c267cbcec1b56723e2864a2 SHA-256: ed1e40be8538f34ac9fb55eb4accaae82dd3376ee7844a50a5be0f5ce1d32649
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 by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=ap+chemistry+periodic+table+college+board PDF link annotation
    • https://mewopufi.weebly.com/uploads/1/3/4/2/134265659/7476604.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370278/normal_5fdfb37d69a33.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/hfhigje/nakizodutavaxotosoteji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fc088b66ce08.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/QlFjagS/29775352187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_5fa6989f655e6.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/2BicfGQ/9round_pulse_login.pdfIn PDF document text
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/rukapil_damid_ratuve.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/1jcjioR/music_mp3_player_juice.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/f2283776-717a-46f9-aa15-3613c41da064/land_rover_workshop_manuals_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489f1283-e14e-4bf8-a5a3-95c7cdd9263d/65651555011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e6743b-d470-4fbc-b63c-052aaed0fd50/47197992701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce7d2e3-2bdc-4b9b-a0c8-fd1fae9574f9/high_school_english_grammar_and_composition_self-practice_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cc0210-4653-4230-954a-f1fd8eaac480/67948774685.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 5720 bytes
SHA-256: 2c786b8a1c91d563ccf6ef46b0c8264542447b9e23311d7d30aa317126eb0efe
font_01_sfnt_off00011079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11079 11112 bytes
SHA-256: 3b139314fadba1947815851bbd45c91440fb90f8502cf3eb81812f4049907140

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