Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a486572ce23341…

MALICIOUS

PDF

58.8 KB Created: 2020-12-20 01:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 923585ec6cca304910745ac26d0c5bf2 SHA-1: d46af0f4ad1913303f5d6232079ae7cc444254b6 SHA-256: 54a486572ce23341e5413d97288bde00d2553cd67b55003301543e63cfd4f6ed
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/strik?utm_term=bt+notification+apk+for+smartwatch PDF link annotation
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/4564541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5fca95f30b820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5f994c1f8ab60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5f918ef54710f.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/2078804.pdfIn PDF document text
    • https://jajivinejide.weebly.com/uploads/1/3/4/3/134354145/b195d9166e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483346/normal_5fd1193c235a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fb88f08a4ba3.pdfIn PDF document text
    • https://jiwanozote.weebly.com/uploads/1/3/4/3/134354006/xuxigefagosawif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462036/normal_5fcf026a0c2dd.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/6c70e414-9a02-4e6c-9440-638f2be74aed/jko_level_1_antiterrorism_pretest_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a3d982-1f59-4168-95fa-1838a89bc05d/charting_oxidation_number_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36948b9d-fdd6-4823-a767-aa9ebde9e760/fuvezotilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8887b4f3-7228-4fbf-83e2-efa8e8dd7139/88245300756.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_off0000ade7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE7 5428 bytes
SHA-256: d733f086685997790d6b2b8d696abd24043c57a965352432618b2e80c9b8daac
font_01_sfnt_off0000c04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04F 8828 bytes
SHA-256: 640cfb21f075d97ca1e73ca761c206e3dd3a25e209689d9bf91f0eb4e6b019f9

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