Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e802598a22da2f…

MALICIOUS

PDF

95.6 KB Created: 2021-07-13 05:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ed261d28215d52955b33d2311b1ebaa SHA-1: 5db27e05a31a1e039e3ed691a56f46292f590b8a SHA-256: e7e802598a22da2f79819cd446b63b323647d941d104dd231cd6da050654cc86
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially track user engagement with the lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://drafthe.ru/uplcv?utm_term=ways+to+get+rid+of+beer+belly
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/3j4si178bn7pgliunt0li2l954/pimigobefaxepalurexazor.pdf
    • https://coatielectronica.com/files/73083705402.pdf
    • http://goref.ru/files/file/41762055750.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3436c983---17114151906.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6c15e76ad---83358966870.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ee189c618---25651604052.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dabd8ca0b4581c96220a12f6f19e7446/zomojogutarogonu.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/42f2c7bc52aabc634a2b4e5efa09cd5c/xazidevu.pdf
    • http://egonseetour.com/FileData/ckfinder/files/20210619_374EC3A877F41894.pdf
    • http://eprdel.cz/userfiles/file/xudid.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/843bb792144c9f2ed6992100a68a1ab0/xumafexolaxukoxusuxinexa.pdf
    • https://mamap.in/ci/userfiles/files/3272842123.pdf
    • http://canadanur.com/resimler/files/vegidomam.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba2616c9a---fipiwiwotelebimilawaja.pdf
    • https://atkarisuli.hu/userfiles/file/wuxuxawamegiso.pdf
    • http://novussiteyonetimi.com/uploads/file/29374072827.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e24d7c92f2c---nagida.pdf
    • http://bkdesign.ee/userfiles/file/82435011462.pdf
    • http://vrieshorst.nl/images/uploads/file/bimuxagudox.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/67td49ke8a9drm03det1i5u38t/faviwepasovo.pdf
    • https://aaaxxion.info/images/file/poputaj.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/qvfgcmvkpc7g4hjapsqa68ivi4/gobojabugab.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/a5b7861b7a02d41f1c1b13431106bcd2/patufip.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013b0a.bin
a82b0f73036e77099328b53d32e4aa6f14ecf965a63b19ac91e0a2637f7ebd22
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13B0A 18656 bytes
font_00_sfnt_off0000f57e.bin
c798b89152578a8984261d1a7cf61578319f64b459e6ad0e56ced24387deba0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10672 bytes
font_01_sfnt_off00010de7.bin
5bca29941407dd9a0b235f6e00527d5d86f8e7af00b252640f971f5be1a06891
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 17456 bytes
font_03_sfnt_off000158a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x158A8 16792 bytes