Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ea82c4ec7de401…

MALICIOUS

PDF

72.8 KB Created: 2021-01-24 14:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: addd8851c7ad42c8b079da8b001586d2 SHA-1: 2037a17560499eaf3f8f6e844917dffebaecd96b SHA-256: 58ea82c4ec7de401f30447c53d11d7ffcad9367f82ab3949c811fd11114186fd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to distribute malicious content. The document body, though heavily obfuscated, appears to be related to search keywords, reinforcing the phishing or malicious content lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wb?keyword=recorder%20karate%20songs%20with%20letters PDF link annotation
    • http://bitjoms.xyz/41244956855tnq5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc5ab9a11647.pdfIn PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/zalij-didozokuxoxo.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/worazasivotixa.pdfIn PDF document text
    • https://devumevone.weebly.com/uploads/1/3/4/5/134589636/fidewokojupuvix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486344/normal_5fecc87fb8ae7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_6004e90fb038b.pdfIn PDF document text
    • http://naturagrush.space/shark_bite_fitting_sizeseanp1.pdfIn PDF document text
    • https://wifaborasumekig.weebly.com/uploads/1/3/2/6/132695644/bef8505440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd636c510b55.pdfIn PDF document text
    • https://tatedamemod.weebly.com/uploads/1/3/0/7/130739791/0a0dac.pdfIn PDF document text
    • http://workshop-fb.ru/top_scorer_in_ipl_2020_latestgy2bc.pdfIn PDF document text
    • https://fipamowusaki.weebly.com/uploads/1/3/4/8/134879766/d9400aefed9fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_5fdb39587e4a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5fcf44292f01a.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/saxefun_womefojepi_wewolodiwe_todelegibam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5fd0db56936a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423431/normal_5fe060c221dea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/filixarabo.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/askep_basalioma.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_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 5364 bytes
SHA-256: 85873ba38dee0c88905781c822994624e89b6019ff229cc5d93e3fa91a04d3a9
font_01_sfnt_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 11608 bytes
SHA-256: 4aaa549b655db3cf72a1f9ef720e5ca5cf77ea5b23a05379266f0ad3cee0ec12

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