Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bc2d9449599292…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 06:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5a58d6bbf7fc69af4725a9cb8791b20d SHA-1: ef576211fa4337331cb0a9f8bb9ed2777930f489 SHA-256: 34bc2d944959929263cf6af040e4314d96b109fd7ef65f5f5b27e91e117f4394
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'soxebez.ru/strik', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, further supporting this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=oracle+sql+join+multiple+strings PDF link annotation
    • http://tesazidon.22web.org/basic_colored_pencil_techniques_bet_borgeson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fd76cffd41c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_602dd71384b7f.pdfIn PDF document text
    • http://jubevejazuten.iblogger.org/67930870779.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_530d81bad7e24590a42419374766d79a.pdf?index=trueIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_6aa19a58878e4e458a00741ecd8cdec9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/38250185464.pdfIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_c56c34217b0446ffac50446d9f6f8ca8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/laginekux/92876152525.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/vuluvexurazenujewamakoga.pdfIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_f884b2d31a0943048fab6f61cad44928.pdf?index=trueIn PDF document text
    • http://gajopem.epizy.com/speaking_activity_games.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_cd4bf260c39c4e7b8c8294fe1a37571c.pdf?index=trueIn PDF document text
    • https://62619d47-812b-4c4f-a232-aa08d86264e8.filesusr.com/ugd/6d62c1_548f019f36c642d09b592fecfbfb5e6d.pdf?index=trueIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_0114ac49d6d045caaeba3c920464eee7.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_2ce923d851c547188e1c6223711099bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/free_printable_grade_sheet_template.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_08eb001960a14c9a99309f2ed8948e92.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_dcdfde66c66144249d3bd0836f9631e7.pdf?index=trueIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_c5342e55568d4a858711264c6d37aec0.pdf?index=trueIn 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_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 5484 bytes
SHA-256: eb7bff9e7a5190483763042d2cb46072e076fc97b7b4f4422514db90a2842716
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 11360 bytes
SHA-256: 26b42f6eb5ab1057820d5f5e25fe9d8800b1f0bba450c62af6494b3e0739dd0d

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