Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5265294e6e46c62…

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 00:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9d00ce459caad83cf1325d516156b12 SHA-1: 6894212b43da6aa00d3de82fb94246c207668570 SHA-256: c5265294e6e46c620b958811946c8eb70d48319bf54becc73e183bc90ce4cf35
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing sites or further malware, as suggested by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12c004e7dd---67357787985.pdf
    • http://dajuicebarus.com/uploads/files/riwepowajolevazukuzulerop.pdf
    • http://skpizzasubs.com/uploads/files/rupasenegigo.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608684ce223f4---boporedamoduzo.pdf
    • https://alharithiforcameras.com/ckfinder/userfiles/files/zigemiwefibopa.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbad5d5df5---nojifalo.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/b5295be4af0fd488e5bbafc64fabf936/fasizogegotexobopuzuvoru.pdf
    • http://alrehabourhome.com/userfiles/files/rebesokidedejirekamumuji.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc93810e1a1---linisufekuwuxokusekamoj.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af2041659---zazudix.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a025851bfa0---jaxuxidabezufu.pdf
    • http://turnyras.lt/Files/file/zuvamusovademete.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b78a00d946---63730423499.pdf
    • https://traveletrust.com/basefile/traveletrustcom/files/sobuvejeborudaxixazuk.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e065d6bb89---bovewaroporaxabejuxag.pdf
    • https://styliststudios.com/imagesTE/file/fenavijixebobinasab.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/0jtg18lpj4na7hhp9fbquvq6u9/82589995252.pdf
    • https://an-professional.ru/img/files/file/runelowune.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17994a8a02---wuzojinufugigimiguvan.pdf
    • http://bafiti.com/sklep/userfiles/file/nujodadixafuveguketiwevob.pdf
    • http://thegroverestaurantnj.com/userfiles/files/95057686587.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e309679a17b8da0cad28befcbb423965/61690182200.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/902e04d54be3e3070f3191437b1a52b8/74935038734.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/426387ef544229a59acdc964e7841051/tibaxilomijosavulosewixeb.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lord+a+mercy+meaning
    • 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_off0000ed9b.bin
ffe379724cb514668c817c75c39a0611f023134441639629562972f92120e4b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 10472 bytes
font_01_sfnt_off0001051e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 16792 bytes
font_02_sfnt_off00011d30.bin
f19b1485ef2648bd45d080b951cf19ba94031b5f878ce9951c4c872f50ecfeee
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 18140 bytes