Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad17d69d3e0ad3a3…

MALICIOUS

PDF

95.7 KB Created: 2021-07-07 21:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f1e86a826d948a56b3cc36f52fb4b2c6 SHA-1: 1429a4f03ccafde3ebbb7dcdc8fa04f198051b09 SHA-256: ad17d69d3e0ad3a3626354e4633cc46fed021a6a03765104be83323bde169b7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the file being a link farm hosted on compromised or disposable domains, likely serving as a lure to phishing or malware download sites. The presence of embedded URLs and the nature of the heuristics suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22cdab8bb9---6578396188.pdf In PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052001335091.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4f1d4e4ad---bimapivurej.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/vilipogofamesi.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa1940672a---24007772731.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/pugazopijil.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210623164148.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c83be2c844---xuxekogezuwurudedizok.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/fkjmmljf3u6muestvtdtni7l8r/zilamuguruxukovevefubid.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0857cfef43e7ad9153bb8d3a76224127/77029285513.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607267917a907---tapanib.pdfIn PDF document text
    • http://csas.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/20210707081627.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/motibeliwosofawikus.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/pudemapidoxegisarog.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7ee7b4d98---30018696686.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/2e51404e3b28555284b6697d6e8a828e/22237728335.pdfIn PDF document text
    • http://digifast.cz/userfiles/81513014404.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/8a68c02960dab8da3a771f0b5f95d59e/47422275509.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/13091753837.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/814553429.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/gugupoloxo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6648422746---nepanixune.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47a0561cab---1630455678.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=notice+period+required+by+current+employerPDF link annotation
    • 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_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 19152 bytes
SHA-256: e1c12328e848d31dbac174de9769a5656f5b72252c17b2df9028d3f43ef2a7ce
font_01_sfnt_off00013eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EED 10824 bytes
SHA-256: db4de79738202e3faec231c8b3d6ba0397a589db2c6570521b1cdbec048cf677
font_02_sfnt_off0001576c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1576C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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