Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7460977a04aacd…

MALICIOUS

PDF

91.9 KB Created: 2021-07-01 00:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1572cc707b86b78ca6705c6ecffb5430 SHA-1: 0bd6c296c298f110a4334d6cde0457c00c4e2ce0 SHA-256: fa7460977a04aacda325946a9c5aff84bc4cb458d9fca284747cfc7c703dad7e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely facilitates the download and execution of a secondary payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://gelateriacool.it/userfiles/files/78296187834.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/5f2d4cf04ba75414be6f9512f6c94cc1/felageveval.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b496f4c8---digixilawuzowe.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/80423458195.pdf
    • http://garage-ys.info/js/upload/files/49839713949.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f29cd00cd---dabuwijepewexudasowasud.pdf
    • http://carszana.com/image/upload/File/75576807446.pdf
    • https://egf.tw/test2/images/file/levipawapeduvixaxesede.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca0631c9b---39560174011.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d03f8e17c---90689534890.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fd71a61d1---70492065954.pdf
    • http://maxidmum.com/images/upload/fck/file/9713782909.pdf
    • http://yonseri.org/userfiles/files/97299863211.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab8237579a---50227755029.pdf
    • http://nappsa.org/userfiles/file/mosazis.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/u4jo256jatc68ouhu7sr0to8d2/nixixewuzof.pdf
    • https://tramhuonghanoi.vn/upload/files/84505194736.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vcnc3gihf72tojdu1oe3r0ag7d/47730756621.pdf
    • http://terredellamagnagrecia.com/userfiles/files/wotorodulebonumafavajasak.pdf
    • https://digireg.org/upload/pefemulorekadasa.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083645aa0ecd---gomukonelifemobaroviponek.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/df30ef757289e0ddc89e9ea2a1f71a87/junoxu.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/c0o1sgggbd5m37c51um6o7l890/24027296950.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/lvc0i216uskohebj07n42b57vj/toveluzovexaropeju.pdf
    • http://amphorabeautyclub.com/campannas/file/74842589059.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pubg+mobile+mod+apk+unlimited+money+and+uc
    • 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_off00010341.bin
2d1fb0e234a6410f4351d1d1ec1ba00f4a4657db5e349053547ef3c0a24c4b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 11036 bytes
font_01_sfnt_off00011c83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C83 16792 bytes
font_02_sfnt_off00013495.bin
fd163433b4afcb0c2368233905a129f469c4cd1ad8d43093d9d0b854404ce33c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13495 17288 bytes