Malicious PDF — malware analysis report

Static analysis result for SHA-256 f21a3f48146d7d45…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 17:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ecc8472a4d0275cb7d4b91be0bcb8107 SHA-1: 599edc24e875f434331a2989b2261710d4f994a6 SHA-256: f21a3f48146d7d4535aa0cebe74031f1230716c232cd6121777ddd5de2f81299
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=actinic+cheilitis+adalah+pdf PDF link annotation
    • https://kufepodesaf.weebly.com/uploads/1/3/4/3/134336702/5037187.pdfIn PDF document text
    • https://kapilike.weebly.com/uploads/1/3/4/6/134686456/9685709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_5fd132360cfb6.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/ruzegijoxuw_puwalujinate_xatosupa_bazurodekirutot.pdfIn PDF document text
    • http://insta-sale.site/benabinemjbbk5.pdfIn PDF document text
    • http://naturebiolog.fun/what_is_nuclear_reaction_in_physics5di9i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_600b7589761d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_601f58ece45f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_601b0d3291e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_6054c6d401b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405184/normal_5ff346c51520d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6029678b2b5f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/finding_volume_calculus_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/how_much_should_a_garage_door_repair_cost.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_7a595b7d46c1422f98f310548ef21c65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosipive/how_to_open_the_back_of_a_timex_indiglo_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/material_science_definition_in_hindi.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_6a5a5a4da78845fd8310f7178a8de7a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donake/office_2019_home_and_business_setup.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 4812 bytes
SHA-256: 0f24f6f254c59c215bf1f11f2abfa57464ff773f73d1b13d5bbfa9bf8274c403
font_01_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 11192 bytes
SHA-256: 56ca5b0fb07d10dd749026240c2f43661a4ef3080aba36fac093df928cb0fb0a
font_02_sfnt_off0001363a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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