Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c22560263316b82…

MALICIOUS

PDF

86.5 KB Created: 2021-09-16 15:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 846e63f99af6ac0a3049982b826faf71 SHA-1: 3c9877964e94bb41069543ad039b995dd50d70a2 SHA-256: 5c22560263316b8257e5ebbd82043221b5a3271e03183a42c9528825951a63f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://smidgel.ru/uplcv?utm_term=honkai+impact+3+controller+support+android', indicates a lure related to gaming, likely to trick users into clicking through to a phishing or malware site.

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 https://smidgel.ru/uplcv?utm_term=honkai+impact+3+controller+support+android PDF link annotation
    • http://simsvizag.com/admin/uploadedfiles/file///79376307091.pdfIn PDF document text
    • http://www.agot.pl/upload/file/39204962959.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/aace94ffcb15515d352fee620228fd59/95426706907.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/83992200946.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/xofoloriluwifu.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/wogumowepawuxapi.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16139051199d6f---21542291479.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/60556636673.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ff0f8b079aee5886237aeeda5ab8ac1e/vakoduwekuro.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614252cc3ae81---zavuvojorosekexadakaparu.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/99792638787.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/zagadoxotawasarojiwaba.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/80062182453.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/95179395528.pdfIn PDF document text
    • https://groupunsur4.com/contents/files/tumibamu.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/3962669219.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/gabivu.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/24741147207.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/sewasal.pdfIn PDF document text
    • http://0048.pl/48files/file/14354214117.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/sotelus.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/9721324724.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/morodekunesilelo.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/firajegijomimakizuso.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/bukipexasotovivenol.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_off0000e2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 21220 bytes
SHA-256: b607622a553e4a4c9934d66c3ad3172ccd31dff7585add75723e93ac7156c538
font_01_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001327c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327C 11028 bytes
SHA-256: a4805118241e5f369fda7265b2e9054be401a81510e4374f825388feae0d9108

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