Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f486098c7f668b1…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 21:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2192f079e989569da5b9635abfa48c74 SHA-1: d21207b9359704130a832b1760f9e9b425eeca31 SHA-256: 9f486098c7f668b1023b76cbcbba861935837542ca6480bf4235edbbb861c26a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on disposable domains, a common tactic for phishing and malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs users to open a password-protected archive, a method to evade gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://oniceh.ru/uplcv?utm_term=how+to+convert+a+winrar+file+to+pdf PDF link annotation
    • http://lab4050.com/upload/editor/file/gugow.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/4167387707.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/39939996119.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/37cf17543ae3466380b8527f47327b5c/1380957312.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/38782063200.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/pifejokifumizutojosazeguj.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/pifosonamuxuroziliz.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/nekip.pdfIn PDF document text
    • http://esejsc.com/upload/files/wadixufodoberizepi.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/68646379901.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/wedefimagezekopinawosovim.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/a15737f78edaff6f0141345142915082/zadat.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/87962052298.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202108201451246830.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/32164194133.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/22650613303.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e7212a88a---89520946268.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/musefoxiw.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/zavuvise.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/64967662902.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/fodugopagowaneliwel.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/67359999261.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/a67cbd963c1020ef5117a39c673cf242/malepegazurobegoxewujepaf.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/nqgvvmlio1rs8rt9ig87am4dj4/91998062782.pdfIn PDF document text
    • http://goref.ru/files/file/49623922562.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_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 10588 bytes
SHA-256: caf044bc85d76fbc4f6a8d2eba606db2036a9824a4e224c9918a1614dbf0b89b
font_02_sfnt_off00010fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB1 18540 bytes
SHA-256: 5fcbbd40e9578fa10387988f274eb4e1c8f9cc6753ebb6fd33ec3687b8c0431a

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