Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd8bac5c2dbb1ff…

MALICIOUS

PDF

68.8 KB Created: 2021-03-18 18:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b7bdcca16640b7ac2848eb321cd63e58 SHA-1: 5972b698c6b25b73b39c7a28ccd8c2d86b7f9e3f SHA-256: 0bd8bac5c2dbb1ff7f0fd5161fc79ab7d68e780ee2fcf5642177d9fef93f3465
156 Risk Score

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://nipisod.ru/wix?keyword=the+boy+from+baby+house+10+pdf PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/wjbiagf/bill_of_lading_template_printable.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/7ece9.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/6jasheL/most_used_hashtags_on_instagram_for_likes.pdfIn PDF document text
    • https://berarenojinoz.weebly.com/uploads/1/3/4/7/134737003/fijegekagufuvawu.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/84339106105.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/hNGCje6/8676300383.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/nuxulikiwab/autobots_transformers_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/77162758307.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/present_perfect_with_already_still_and_yet.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/kansas_driver_s_license_permit_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/wokupedilowabewan.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/soditovefam.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/xemumudujowi.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/72544824128.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/vakuzijenodovebafamugigef.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/fishing_report_near_me_today.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/82902050939.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_off0000d1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A0 5636 bytes
SHA-256: c60d168e5c0691b7ead8cbeefe425fb46577cdcf48d400a6f7fb196406a16885
font_01_sfnt_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 9820 bytes
SHA-256: 7b388e508e756e1f58ced92ff33377b7f13206085835947ba41932bb4abb69e7

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