Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad17d548a93e10b…

MALICIOUS

PDF

84.6 KB Created: 2021-09-17 06:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06c915bad0c4b3be2e881d41874bf745 SHA-1: 0672a95ba876690129d03103db396522bc853464 SHA-256: 9ad17d548a93e10b6ccebe7d95a15fad8b8bd4a8bdf72b970bc17e905890d325
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, including compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and a link farm indicates a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://incense888.com/uploads/files/202109091511114308.pdf In PDF document text
    • https://anjingliar2.com/contents/files/bobed.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/tusabaposaxonugo.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/bofuvegesafuk.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/47565390678.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613417bb425b9---matopodubukagulepuga.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/niwoko.pdfIn PDF document text
    • https://unaizahic.com/Files/files/47979400914.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/biralixuf.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/50983563665.pdfIn PDF document text
    • http://tzsunup.com/upload/kumutuwajumikonefore.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/28131321811.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-3/20210903134525821274.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/8ba25e25ed6c32c0d9b6cffddff40dec/42909553267.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/nepovus.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/1197333584.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/tolojim.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/padilorajuxujoriv.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210907_022722.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/pr8i72ngl7km7590ub3p9k3pq2/12298547897.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202109/file/1631522197.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/jiwelofuru.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140bf5a62119---ratawebonunixori.pdfIn PDF document text
    • http://ilovestory.com/upload/file/69771022040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=wrestling+revolution+3d+wwe+2k20+mod+downloadPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 11344 bytes
SHA-256: 735e75b529c7148172934876cdf62d1120b8ac8663ec8a3a53e4e85745202240
font_01_sfnt_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 18284 bytes
SHA-256: c70be76f344b47243b525e8e349538ae86589902074f05a2c03cbbfd8f717130
font_02_sfnt_off00012a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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