Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c27feccecac033…

MALICIOUS

PDF

119.1 KB Created: 2021-06-28 13:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e00c7f9fed12b68b76f5486f761e5835 SHA-1: 33f1f165c7c44b5b8d5c049fcda07e9989f550ab SHA-256: 38c27feccecac0331b7bef86c4a44438107afce5b2cd1a4db92e74e4ff538a7f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of multiple compromised domains is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9702

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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e6607e360641f4e4012f993759e2915e/61900304961.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609105a887a64---gigavete.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b1321baf---gejevojaxuredigebod.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/3o6e8blsrsba277cfts7l358tj/rizunuselobokunafo.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/1fc7501a6e631ea0f361bbb5826c49e3/97892722723.pdf
    • http://whuntex.ru/userfiles/file/lewiwidoveg.pdf
    • http://idcla.net/upload/files/diwifujele.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/91bc055d31d2ad15086923fc468af6a2/54874164632.pdf
    • http://sskj.pl/userfiles/file/31386853183.pdf
    • https://accu-split.com/userfiles/files/16467308185.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb913d5d96---88732875585.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4e4af5783f07317d5893c34d5d086957/metasinorexonimijusuxo.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64f95b3c76---16489859498.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/631210e14f36d7651e88ae880cc6dbed/repoxikururisaxutademit.pdf
    • https://noriupapildu.lt/ckfinder/userfiles/files/6613752211.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/5vu5gulors4fkiqug1s7ias331/9774366429.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/1d1tutmnv5c00jlsejo2evjlbc/64483288293.pdf
    • http://changrung.com/ckfinder/userfiles/files/38124470186.pdf
    • https://fablab808.com/nbloom/fckuploads/file/vagasapukipuzu.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/nefuwubozajumal.pdf
    • http://alituncer.com/userfiles/file/vaxewolotom.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/51551899680.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/0gqevmks4ikr4imalunc1aoln1/kanikiputevixegogimi.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9cde6a3c5---57481299737.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee137a5a71---tedoravutiladawik.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=codominance+meaning+in+biology
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014788.bin
59f578c94af06962a73297dd0d5353468c5e92d98b2d675ca09bf8a923116d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14788 2428 bytes
font_01_sfnt_off000151ed.bin
753d0c4b4b1ba20af8aba1f3671fc979eaff215889e6be34c0e8e6f6c764d162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151ED 10632 bytes
font_02_sfnt_off000169f8.bin
defbac3d8f257e4b3e9bd9253a58dba6a0308bee1f21d73f1dee4d47ff85094e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169F8 17364 bytes
font_03_sfnt_off00018387.bin
91c2f35355bfb37f0914fc395ae12d0dd415e23c88da751cc1f8956a2dabf71c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18387 18300 bytes
font_04_sfnt_off0001b455.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B455 16792 bytes

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