Malicious PDF — malware analysis report

Static analysis result for SHA-256 94868dc9afba1cd2…

MALICIOUS

PDF

91.5 KB Created: 2021-06-29 06:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60d22b7d63497e2f668ef85e304a1fe7 SHA-1: c38e9884d4bf9b46836670b4268e1b436d63565f SHA-256: 94868dc9afba1cd29ef5463410340e857595791028638c1d599852db7a8694d7
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs pointing to compromised CMS upload directories, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to malicious or phishing content.

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://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/cdc945e0c857ce38b76d7a0d0bc78c5b/60277394244.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/6siqkmua7e8hkuid73veq6bdqb/gobapepebut.pdf
    • https://taechoclub.com/FileData/ckfinder/files/20210604_F146DE19D6297690.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/6e7172792d7d1a8c33db728435053d6c/zowedobibupok.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7rbufvk1c3ve616r5tp2bun5ij/juripezadanilasaj.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2612e49ab---pobezezifewodon.pdf
    • https://xehowo24h.com/images/ckeditor/files/99936925952.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/e32ebdefb550fe15365fc02977120f4a/tezefabeb.pdf
    • https://mmszke.hu/files/file/76468979720.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703e9420c12---69269421502.pdf
    • https://kp-bs.ru/upload/files/biwowawojutatumigizizuvav.pdf
    • https://1877painters.com/FCKeditor/file/wozagod.pdf
    • http://alituncer.com/userfiles/file/zepurekami.pdf
    • http://gdwtechnology.com/fckeditor/file/23899587447.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160979c9df3b97---gabexaxakebademul.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/of8pljf7l1mss7700ifsmh8aba/96481967728.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084048dadb8c---50105839543.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160838f6d7dda1---titefur.pdf
    • http://goksirlambinowice.pl/img/upload/files/45401581196.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/91d305c1be0bfeada216f1e5057c4703/faran.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/38055858535.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608364a206716---nusun.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b023cefbb58cd701727e103017b0f548/menatesovanu.pdf
    • http://gamax-motor.cz/data/dokumenty/61914568117.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=diagram+maslow%27s+hierarchy+of+needs
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101f0.bin
24abde96974858a9955586135f3052c5cf798bcd3839856bb87c1b0c08adb578
pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 11060 bytes
font_01_sfnt_off00011b5b.bin
62dfb852ce15058d29f9a0d46f3e55ace30fe49e090994c04584b33a23059204
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5B 17260 bytes
font_02_sfnt_off00014875.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14875 16792 bytes