Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eedc27c23ff8db5…

MALICIOUS

PDF

76.4 KB Created: 2021-04-30 03:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3ec21839751af678f6c35c156dcc42a2 SHA-1: 123f2e4b3942b3eee931dd6e0ecde9e3ef7d3f38 SHA-256: 0eedc27c23ff8db512864209111f301e9cd9e9f82690c2ee5745f07a245c5c13
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://vilenefex.ru/strik?utm_term=search+bar+in+google+sheets PDF link annotation
    • https://vetudibe.weebly.com/uploads/1/3/5/3/135320479/5948127.pdfIn PDF document text
    • https://cdn.sqhk.co/zipaduteki/jdFifgc/8662640898.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/bjginhh/xisipujofuseg.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/ggiidjj/fanivazufudoxulupo.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/gefGibn/kidadinisagenaf.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/iiwhbjd/20804318840.pdfIn PDF document text
    • https://cdn.sqhk.co/fixuzigetir/dyplwie/linkedin_app_for_windows_7_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/djcbmG0/idle_meal_order_clicker_tycoon_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/dgcpjgc/shoot_osama_game_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/hi0idQS/95330510706.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/MidI5aU/demaboveludisowos.pdfIn PDF document text
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/9676266.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/cgc0KlG/tofakikekoz.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/kutedazidikuwax.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/fomudebipefasu/snow_white_with_the_red_hair_episode_14_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/suziwokafurid.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/sijofozuzijojukisigisem.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_9b43c3c0e0d64955a91cdd9ac6480b64.pdf?index=trueIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_463c4187032145f3bbca5f1038c51aaf.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 5304 bytes
SHA-256: ecac489b044cda75b3150fde157ed6ebc31c63fd18030b6faee77fd536b39a75
font_01_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 10732 bytes
SHA-256: a934c687759410f1f5cb523d56b595f604cb87d049da6bae602ceb90ef4f106c

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