Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c9ab0f58e02f78…

MALICIOUS

PDF

70.3 KB Created: 2021-05-23 09:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 73d9265d76b4dc0087dd58ade3562a92 SHA-1: e6f601970d3a443782543cdde44c87113babdc43 SHA-256: 97c9ab0f58e02f781c306250e9ab2982060af9de601fd19fd094bf639797fcc7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, flagged by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were directly extracted, the presence of numerous external URLs, including one pointing to 'gimoguvi.ru/strik', strongly suggests a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/strik?utm_term=advantech+adam+6050 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450045/normal_603832d1a359e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_60465527d8407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_603fc2954c895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd309c9eb94f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_602858ea27ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_6032f3371ddb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385231/normal_5ff755f56c140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_6054ad23ba089.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5fdf4fb50ab0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_5fe620c9f3b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_604a15c433e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_6041ef2cec87c.pdfIn PDF document text
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/1ed384ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_605f75eb5e5d1.pdfIn PDF document text
    • https://rufajesovulibo.weebly.com/uploads/1/3/4/2/134235528/lasoten_gamapuserikidix_virabubavudidu.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/1d7ffdb7-de7f-470d-a3e7-8ae71d9c4b59/23745454283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07fd19c-90fc-4c42-8dbc-714ebbacfeab/86092494699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b9220d-342e-40f5-88e1-480021ae32b4/lamakimufefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72639df1-6cbc-40fe-87cc-5c62f80573f5/62440110695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77dcf0ae-eef1-433d-94be-c8f6909fdc8a/dd_delivery_tracking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a2f6104-5af9-4369-b30a-50f3cb9e3e1d/76326891153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45851ee5-fc18-4436-9cff-8b1aafbcbf0f/9960435118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c4efa0-82b1-42c5-b3ad-647f68b937c3/bapokupafiwerazob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50af797-d198-44b5-a672-58a09a1d2db2/what_card_symbolizes_death.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_off0000d31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31A 5340 bytes
SHA-256: 52dac56e1380f9284e447290c05e3441a36d0a5da5e0cc88c41c9c3c6614e219
font_01_sfnt_off0000e52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52C 10820 bytes
SHA-256: 680b6f8e017eaa2409a6e64ff6e72ed7db6463249f8cf79916c20da64d212337

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