Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43ab7b42df43b95…

MALICIOUS

PDF

80.6 KB Created: 2021-09-02 21:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 3aaa767b1cce1c9ae45f70f4874453cc SHA-1: 5cc10ab80614ae81211ee99556c615feb1eef040 SHA-256: d43ab7b42df43b952d8b1274b98d0f506b751e282fba5875710321186de7444f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=protect+america+alarm+manual PDF link annotation
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/820f10f5ea4593156b83296105deff42/91306791423.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/dd4bbc40d3312c5e09a3b247be9f288d/bedojojuwitoxef.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c814bd9d0---venonep.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/98384666378.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/81671556882.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/wukititikunamara.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/69ec3cb8cdd1ba4adee826a7e6a8b477/lebebesemalem.pdfIn PDF document text
    • http://www.bash.cl/media/file/83249531514.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/sujagomeka.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/270745154969.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/de3a004ba759a820de97880666feb718/150447114.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/e8ff5380292905307117212ee9a9a2a1/68360153965.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f308042ad---49721056409.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/cn82hjmstjclsc7dgec6pcjfcp/jaxekuberafibaturepex.pdfIn PDF document text
    • http://cartopack.com/Images/file/92470243400.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16070daacaedf4---54096927886.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/bulidixonekivufivo.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085791ab59ae---najobikumajubopom.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/wefovexevog.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/78885429064.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/widegemem.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210725115040.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000d6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FB 17880 bytes
SHA-256: 6509e9320b0925598f72b17f21a506a515541215e0822cc49f56f838ac604fe3
font_01_sfnt_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 10324 bytes
SHA-256: bbc281dd940ec4b25fbf47bbff0d282632c0f417fae277783c6bcc199b34e6ba
font_02_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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