Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38a4eaf3331ee49…

MALICIOUS

PDF

38.2 KB Created: 2020-11-03 12:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d82d7c42d07d3a5ca749821f809778b3 SHA-1: 7065fa959c286ea12f12c3d5d54b46d73a50215d SHA-256: d38a4eaf3331ee49fa7483b6e5eab4102cdb08e59a6e8efc70db1c6b351d702f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating an attempt to lead users to malicious content. The ML classifier strongly flagged this PDF as malicious. Although no scripts were extracted, the presence of numerous links and the redirector URL suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=the+things+they+carried+quotes+and+analysis In PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/dfab9b7ea3405.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/c7f00a8d.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/naxafamo.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/37c37c2e-6f69-4b19-a0da-f07848bc3b30/lurakafosipilupuvawub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605f2e25-1383-48e8-b71a-158c56d74674/jugoxividakujipenikarinum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9abd9b9-2173-4437-aa5b-ce42366507d8/zoruwepifomizaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3038/3272/files/nghi_thuc_tung_kinh_dia_tang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f6c908-d5bf-415b-abe4-b7b94773b008/aptitude_test_for_engineering_students.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/curso_de_frances_em_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fdf904-4191-4021-9dc6-c075ecf8dec1/41425374435.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_off000059be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BE 5380 bytes
SHA-256: cbdecc52b6ea069c559da60e165027903d4e183a1036dc31030182ea19494c84
font_01_sfnt_off00006c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C05 9452 bytes
SHA-256: ed78217eab97b016c3c37ce00b310b1064996df6112b3703a8520ee00d14d11d

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