Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad01fc488f23775…

MALICIOUS

PDF

72.0 KB Created: 2021-04-07 02:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd5a8f0425bd8c8627dcb719173f5cd1 SHA-1: b19326819399fa7af75077dc6b34557255f2e5d8 SHA-256: 5ad01fc488f237759993c9378bdf6e4966563688731592020313639513a31841
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://pelibifir.ru/award?keyword=bhp+billiton+plc+annual+report+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371812/normal_603a75be337ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_60625da50ef43.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/7x6jGha/33805732932.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/62gihhc/zizobamix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_5fe64e35b4d76.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/HbOhdic/chivalry_medieval_warfare_gameplay_pc.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/ravuxudibure/zujuwilobekowelalevogo.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_a1dceaf1dd474b669e418d5a67822efa.pdf?index=trueIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_1f487769914041f585a974ee31fd1d93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/marriage_registration_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/najogonisidasaxutebuzamow.pdfIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_eb826255dd0e46c98e59e06b07e1a56d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/easy_guitar_songs_for_beginners_acoustic.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/isaimini_movies_2019_tamil.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_94b57bfe652b41d2882fa7881b8cf91c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/asphalt_7_ipad_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/marvel_movies_in_order_of_story.pdfIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_3a5f2b5bf7474a469c3e3d243d1e9050.pdf?index=trueIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_677df2891317417a8161085e364df6d1.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_cf4054d2e6fe44138e50fb9dc7af5e03.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89F 5528 bytes
SHA-256: a4d21cdc78fe7bafc5679c218476aeb62fb9124ef31449548df195744d814c1b
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 11628 bytes
SHA-256: 6948f70f20a0e203845a38de06a02c9b614e6df173e447f4daabb3d3b10351be

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