Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99457c98ea5575d…

MALICIOUS

PDF

79.8 KB Created: 2021-03-20 12:21:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fc456e2af9488df987312f2ad90f6ec2 SHA-1: 77f328abb7989f23d732680e0164dd76104de58d SHA-256: e99457c98ea5575d83370b071a4fc2ee88d5cbdcef79e2c857bcef663b13892a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a 'link farm' heuristic, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO manipulation attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=dutch+colonial+house+interior PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489259/normal_5fdc844c421b6.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/aNjdGWD/tumblr_aesthetics_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/jawosuzexe/gciapii/1033642039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393485/normal_5fe23e86623d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_6030a2ea9d9c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fe291a91b759.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/how_to_identify_black_walnut_in_winter.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/if96vrX/80985333255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_602e35dc9fd16.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/devuxuzejozam/lefulelidexufodog.pdfIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_01edcc27189d431c99a71347566edeeb.pdf?index=trueIn PDF document text
    • http://mafonevaverazux.atwebpages.com/1571028400.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/spacedesk_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/john_deere_lawn_tractor_used_value.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/cadence_of_hyrule_free.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_4cc4604a7f14459fa680c08387de899a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/pool_party_invitations_templates_free_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/29662714255.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/adventists_affirm.pdfIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_51d751fc764047ba82a0f72b4f227cb8.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_83b6216015734f1a9c62f2fd8abd7164.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/39013485031.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_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 4888 bytes
SHA-256: c258f0c986314802e390a774560a1640abb99ba1c3c5b142c63a21f58462c479
font_01_sfnt_off00010c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C38 11124 bytes
SHA-256: 937b9006c37ecf1fba58a8387b037955711bc0d0ff33f8e8bb2ebe95f728dd99

Open this report in the interactive analyzer, or submit your own file for analysis.