Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2607b4e33a83088…

MALICIOUS

PDF

84.7 KB Created: 2021-07-16 21:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e97b8e7e82b0411e164a5d8f763dd1d1 SHA-1: 0dd8ce3fa84cf83887639d1ffd52b5a5d497cab8 SHA-256: f2607b4e33a8308813ae3df754e96f9c58ad9394f39485ff7e1c2c797b84c171
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://africanhairbraidingsalon.com/userfiles/file/revajebadurolenefupim.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089ca7111755---59494886373.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e082a57a5---rasujeledun.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5a84c1d22---pevozitofoxadexugetugoraf.pdf
    • https://sasalidayanisma.org/uploads/file/funutizedawuranuzap.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa11972442f---99052835428.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/1247a304b49a4230d859301dea3b3176/96938385671.pdf
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/65280377844.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b756f242c---9796417488.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e046a28e857---kimugezafejogudeginel.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071e852679c7---42013810241.pdf
    • https://cpsguffanti.com/uploads/file/82902659398.pdf
    • https://alatheir.com/atheirwsfiles/file/59869067755.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5219fc5f7e---majutofazapizaleve.pdf
    • http://jfac.kr/ckfinder/userfiles/files/14192793928.pdf
    • http://antoniolescio.net/userfiles/files/85436678747.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/05f62e6a158b1a511231b60e81280c54/94180572897.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/c97b4b4a7f5dc03c32f45030a2bb3db5/22047290502.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070d58568387---lupofalolapevefadefimob.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a64ddb0de9e---66730034045.pdf
    • http://thaisomboonautopart.com/userfiles/files/15647876010.pdf
    • http://austintownfitch1980.com/clients/879833/File/timanibuvem.pdf
    • https://by-express.com/upfiles/editor/files/31647658200.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6de23c9f12---bokaxev.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607847d3ed952---jukumuwilinareg.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=young+justice+season+3+torrent+download
    • 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_off0000e364.bin
a6f4faf776b6ac1d1fdb11dfb0133438c12d2405cfeae3d18b7ea0fc555716ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 18344 bytes
font_01_sfnt_off00011388.bin
cb6906e5a06e7bf4a65a905b8613e2f5e8ee2107b3ff4c20d94486a35a1a7bef
pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 11016 bytes
font_02_sfnt_off00012d2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2D 16792 bytes