Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daa08161a5774c9…

MALICIOUS

PDF

91.3 KB Created: 2021-07-04 20:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 33ec7d3ee75000e0c6372ec55bd51dd6 SHA-1: 63bb0bd07d79d9743950210bc7a82140af7d67fe SHA-256: 9daa08161a5774c9516b3025a0f5bfe111be5474872d639874c75d5da0951661
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress installations. This behavior is characteristic of a link farm designed to redirect users to malicious websites, likely for phishing or malware delivery. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=which+is+easier+to+learn+french+or+german PDF link annotation
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9910110b---84037508051.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/47889619978.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a63bcace1---nisujisubomagupilezopeko.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/87d0440f945fe8c2e3950a7210fcd597/dagezotugudizum.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/67163392453.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6253205d---gebalitit.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/wibak.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4133fc054c---50787586561.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e551b8b86e---kijeriperafevokaj.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ee63b036e---fibofuvabifuwofurovufapag.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/14534990056.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/758f48706d9daf0cece9c363cbfc05ca/92250695825.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/rufebab.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1efc2bef91---33870136179.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/e56f7b52eb420f2257eb474a4fe7715b/mukokubiwesejewago.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/769e604353fc3c843b5a31a1ef9c5c2a/loxufo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/cu16j5fqrbs8k18r0na4ur36nf/89234672534.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7b6f883c0---nesekobanovus.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/15400202487.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/364533c0ce1a482d1a2cffff3718d63b/jalopoz.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/gigoxejenorixutetox.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001109a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109A 10776 bytes
SHA-256: 80fb4746afcd261a5d2d5fd3e176226af2b42bf500ce18cbfee30fab41fcd69e
font_02_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 17864 bytes
SHA-256: 2c418a0a29bf326a4b0f28bf10d59f5be47645331e78cb83c83d5c35332f4b67
font_03_sfnt_off00015758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15758 1724 bytes
SHA-256: 14337ebc362ddd08554e80a48f0a7940a6b0942ab64cf41cf9e3b9355e6f30c5