Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3974e9112d9e18a…

MALICIOUS

PDF

75.5 KB Created: 2021-04-07 23:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: edb2b356a66dd0024346dbe40f6c4762 SHA-1: 26ad3096ebe0baeed6d977b505f906a975b07905 SHA-256: d3974e9112d9e18a4b3457343f92d46697554d4ff6645703c322ba7e04115ddb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs, such as 'https://soxebez.ru/strik?utm_term=how+much+do+you+get+paid+at+zaxby%2527s', are indicative of attempts to redirect users to malicious sites.

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://soxebez.ru/strik?utm_term=how+much+do+you+get+paid+at+zaxby%2527s PDF link annotation
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/bevozofapixo-jotexep-fosobowavo-wiveforiruwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_6051a30c4f8c1.pdfIn PDF document text
    • https://kiwedudibobo.weebly.com/uploads/1/3/6/0/136097088/4287418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5fd903667980a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_605652e7c51ec.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/zuvodalilafom.pdfIn PDF document text
    • https://zitidimesefe.weebly.com/uploads/1/3/1/6/131606065/ea419499188b.pdfIn PDF document text
    • https://zexibimugurarem.weebly.com/uploads/1/3/5/4/135400238/353760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444630/normal_5fda7dca4d3f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5fed5dbccea4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466172/normal_6046d6a9b4ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450907/normal_601dffbdb1521.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_83bbffe76d28494fa87ae0bd4000a0c5.pdf?index=trueIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_1c6002511e2b4692928a4a1be124bacf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/cisco_router_2900_configuration_guide.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_dd21d9af416442539bac81d3adbf83a9.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_12751063a9954d1ba23f4ff2401c74b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libosokune/fishing_cooking_guide_vanilla_horde.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/78505631285.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/fuxowap.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/administracion_hotelera.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_off0000e75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 5808 bytes
SHA-256: 9a5795387b5f9ade6871537c12eef9d4201899cf41a4591a228a2d12435526d7
font_01_sfnt_off0000fb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB25 11044 bytes
SHA-256: 34f203d11723a1a42acd8e628d8c2b0a99b5f3cfffca7de3c232c54b840343fa