Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48080ef0ad54460…

MALICIOUS

PDF

58.7 KB Created: 2020-11-25 23:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0ba967d938f7140e8cb430e0fd6370a8 SHA-1: 11ca1441ce8f9f0e0f43f8fe1ce302bf5eaba1a9 SHA-256: a48080ef0ad544604d42101885872f2190924e48e584aa822caff1c3757777ce
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://trafftec.ru/123?utm_term=plastic+paradise+worksheet+quizlet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459780/normal_5fa9bef690057.pdfIn PDF document text
    • https://bofufawikifof.weebly.com/uploads/1/3/4/2/134235483/xuboxaredegaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5fbc8a28860f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f9582f04fb18.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/gegabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8aa633b84a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f87c1b18950f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f90dd8441ba7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tulosa/ielts_reading_passages_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ascii_hex_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e00be4-a131-4c9b-beed-27b4deafa3a5/ademas_definition_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/android_box_not_working_september_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1311a2-292b-4300-90ee-2b8a08dd2a03/19717347967.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/backup_celular_android.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 6

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_off0000ab58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB58 5496 bytes
SHA-256: b939026702686a02ba0c02a6cab13c3dd41720b6a0d4b33561f5120760a8dd36
font_01_sfnt_off0000be1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1A 9408 bytes
SHA-256: 1e6135698f2abd3139f97b58ebe8e6f9c483c3715bd0e2bfe153650bfacb143e

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