Malicious PDF — malware analysis report

Static analysis result for SHA-256 8461711304f34a8e…

MALICIOUS

PDF

89.1 KB Created: 2021-08-07 15:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 76de64cf8d2f59231c902c86d4ecb810 SHA-1: 48e9626995dcc6ae662af61357f2a265ef505f37 SHA-256: 8461711304f34a8e852d02060ee2edf622a97d060e8e330dd7936b4017b608cb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites, suggesting it is part of a phishing campaign designed to trick users into downloading malware. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The embedded URLs and the nature of the links (e.g., 'hungry shark evolution hack download ios') point towards a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=hungry+shark+evolution+hack+download+ios PDF link annotation
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b91e768577---wijuvamujum.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094b06494dd3---69947425941.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/beac15801266caa0f434ef726c33d4fe/mevigemogit.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3e4c08dd---83888324049.pdfIn PDF document text
    • https://edusfera.pl/upload/file/36530611367.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec85d2952c---lukuxa.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ddccfe41---32393755137.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/36550783314.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/15630499408.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30769b970---valozubajulelaranirewu.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6984f9a84e---jafiwerozixefakuzuv.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/8087084541.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/a93fcfc746473d57c75f7060cf951c1d/xopotajikovew.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/5f6a056e85db8b3c06d83badf0df150f/tazam.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6a2a1c0047285014f0806256479a60b1/88010737541.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c461427e12f---wemegup.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/vesemonejurudegaseno.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/venetukoworanok.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/91102212906.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/i6n547j0rsgc0lpq0gpvgl4rn6/berekozodele.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/31533717021.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 11096 bytes
SHA-256: 2cf897a8ea9824a54e1796ea1c1df7fed02ea86e3bf9feaf3a7e2988f0225e9d
font_02_sfnt_off00012607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 17308 bytes
SHA-256: ed403c4f544e9585d9bdf8304c05f7f221cf0a8381f86e6408b406f418f52ecc

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