Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d59b1ca5f1e12e…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 09:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 64131ab75f5c35b2d49ba9edb0b03e0a SHA-1: e80e5869d01a65aaceced620ed28789810112083 SHA-256: 24d59b1ca5f1e12e478a960d7ef964a7e6e1c843cec5cfac587a45385bdf5a9a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/award?keyword=funza+lushaka+bursary+forms+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/wobuwaseja/8haPDgE/ladamebomorunuraz.pdfIn PDF document text
    • https://kojuvaneginumo.weebly.com/uploads/1/3/4/8/134890768/tumipozawaze-vapama-lewumasifipibes.pdfIn PDF document text
    • https://cdn.sqhk.co/vutazekerubu/4Wial3k/yeezy_supply_slides_drop_time.pdfIn PDF document text
    • https://tojumemi.weebly.com/uploads/1/3/1/3/131379390/vuzom.pdfIn PDF document text
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/f017bbb7a8e.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/e184c9aa-9e9b-407a-a2f4-c711995ce9e1/final_fantasy_lightning_returns_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/banner_background_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/camera_cho_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d167ba0-6a2f-475c-96d1-68a539095000/remiliterolada.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_fdd60c56b6f84977a7e2de44b65e5dda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/taco_bell_nutrition_facts_power_bowl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630d8457-84b6-4e28-953c-08d2da12e8cd/what_is_the_portal_circulation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31722109-36fd-4ae1-a67a-d4035b5db116/what_does_hondo_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/bee_bee_boppin_manual.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_97c28beaa44648afa240675136abe89c.pdf?index=trueIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_d675d88797394c9c9282af2c0963cec5.pdf?index=trueIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_6658570e43934c709ba1072cfd87ed2e.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_688ecb337dc1402eabdeb83647ff5544.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bf22d6-e3f2-41dc-a437-dc502742b125/93274087510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b9f6c0-635e-4544-8e6d-2dc818fd7ac4/31803491746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387add08-6ea8-4253-a5fb-d710df328ae2/89569217280.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_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 5864 bytes
SHA-256: b9ea8e6ca0c4697d86ff0b15466fdb248a51cf08c519f980f93c524c74d9152f
font_01_sfnt_off0000fff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF5 11348 bytes
SHA-256: 4715f1a7e7d8963ce516ea2e430ad6b3350434f79816abcb704fd79cef1902bb