Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c22fd50b1df54f8…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 03:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2b95d087994b56a392f1949301b465b8 SHA-1: 3e52dc6dcc16e03e6185930a4ec3d4286128e365 SHA-256: 9c22fd50b1df54f8512402c624c7af99e9cfa886cc136130ce49f74c1a4c51eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources that likely host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ahreco.com/uploads/news_file/xifazedikegudi.pdf In PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/6486afcfd6c09f961cce9122c874e389/53859149796.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/bd7530c1140350866d894feb05dc81b7/48699482339.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/tisurilapewoz.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/98eac04666e0cfdf6ed2be289b370e30/tusafiwumewuxuzimi.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/jaxuti.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/godeguruberalise.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/ce8250ef9ab2fefcd5f847c955a3da52/jopalevapo.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/47621100895.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/21515698020.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160afe17067be2---dujemosijunifawifuxiki.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608767438bc80---zimitavixux.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bd9ad0036---fapoter.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/7dbadb0a13558af5fb316c03b40dbf15/gifepuju.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ptpt7b925qle6tdtjph0bjmr44/18753214089.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3f12d54a932a2af1afc539cb0012bc87/miniz.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/66632617290.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/50e3eed18d5bbf0fb39c8def508206cf/zogidudodezawigukowodojej.pdfIn PDF document text
    • http://synowka.pl/galeria/file/jivilamimamag.pdfIn PDF document text
    • http://www.celso.org/download/fusekejarafode.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/migobela.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/61974214771.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3e46b9df8be64ded5712d45f66f682d7/sasuvuvuzutov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=positive+posterior+drawer+testPDF 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_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A36 10388 bytes
SHA-256: e00a75d0e2d259931672254fa57ca9a1508608fa949e6fb86de5700bf6ae4d34
font_02_sfnt_off000121ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EF 17616 bytes
SHA-256: 007e7ef9ec247c81dc4bd653a48b4627a33ea46a3ea608bcd39e4ef3b67656ba

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