Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7f57666b5b3637…

MALICIOUS

PDF

67.7 KB Created: 2020-12-16 07:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f9c1bc8cd4aab7d6a47910bc4b261ff4 SHA-1: 315cdf4617d852c89682bdd67f19f924515e8ce1 SHA-256: ab7f57666b5b3637b65302fdb498d702ec20f59e1c33482f4b0b7209912eaf8e
214 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The PDF also hosts a large number of external links, suggesting it is part of a link farm designed to manipulate search engine results. While no scripts were directly extracted, the presence of malicious links and the ClamAV detection strongly suggest malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=diablo+3+barbarian+build+fresh+70 In PDF document text
    • https://woxejisuwu.weebly.com/uploads/1/3/4/3/134322210/lepadonumerulilejo.pdfIn PDF document text
    • https://xexogabowagub.weebly.com/uploads/1/3/4/4/134438270/8755763.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/nojuvenig.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/d095f401-0d61-4426-80c3-4df483c9e8e7/14668719313.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1758ebe9b6939510ebb53/t/5fc9a518856278751756920b/1607050522695/61499724825.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7185a5fa98a681f0c9b59/t/5fd671e67fc52c206926b6af/1607889384590/7067441447.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fcb209385bc3a28a6057ed1/1607147668517/dowozupitidaxigobifari.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd308239b0722912b0841/t/5fc30b4bcb3e0f5771b48d2f/1606617932122/chhello_divas_movie_download_part_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59af42e7-ccdc-419b-a380-8a8533fb6b64/jenekuvapezazi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33129affbf90a66f953cc/t/5fd1bdd6ef89ac668375f63f/1607581144622/26114471758.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc660b9c6229360ecd248cd/t/5fc7e394dfe7bb6ff614e82e/1606935447003/70852174899.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2e89e1f2823a1205f0e1/1606233737875/losebek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ecb8d49dd12447343a71/t/5fc56a7dcb3e0f5771063abd/1606773373525/machi_koro_bright_lights_big_city_rules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a77be9b6939510c7598/t/5fcf9c56faf0bc04d1d328a7/1607441494990/world_war_1_dates_start_and_end.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_off0000cb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB68 5520 bytes
SHA-256: 1461baf9bd541e877d9e8dd6c9f31a1adda47b356a18c5aa7851b6dc815b33e9
font_01_sfnt_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 10592 bytes
SHA-256: 05346592e5fcc9b2a6fc2e266003998a49c2729dce2832e2b1f4808a8f71ef4e

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