Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8ca96b56180a77…

MALICIOUS

PDF

80.5 KB Created: 2021-07-04 11:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 090732048ceed1cf27309955bfaa3322 SHA-1: 43f081af53f271887cd5a2e4280487f36715d046 SHA-256: 2f8ca96b56180a77e43c051695c3663e6b4639567440fd5aa27f35b2aff18544
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to websites, some of which are hosted on compromised CMS platforms. This suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7e56cc3b96220bdd83a22f7c6bcf730a/83155887139.pdf
    • http://yule-sign.com/upload/editor/file/20210604155143.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/susrdvbuo517palg5euaut97id/98100830840.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081fca105662---27643196763.pdf
    • https://isleo.com/i_photos/file/22923902190.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bb36bab8e---xejefulodutok.pdf
    • http://daydreamspin.com/userfiles/file/punokowesaxazekir.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfcdf6e456---muxijafulejorajolasod.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/00ee71df466d17b4769e5d8cbdc40d0f/tuwivobowowesagusej.pdf
    • https://damsindia.org/admin/uploads/file/66372942159.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/7f35360180b2be5bb0ebb831d5e5fda0/lolivuxeno.pdf
    • http://wrtour.com/FileData/ckfinder/files/20210615_76C0EFAF99F8FA34.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160705c3d14750---tosagigebosagof.pdf
    • https://people11people.gr/uploads/File/12386228995.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/e2a3011260dc0e406ccea341cf354b61/60448027846.pdf
    • http://gilendor.cz/userfiles/file/29047744624.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609975b029e18---87051493066.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/69081567993.pdf
    • https://ubk-sad.de/azubi/userfiles/files/pawegiregozabamarufusa.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/anqloc5tumue6jvcfadnifhbhr/45562576454.pdf
    • http://allasclub.com/campannas/file/24318635864.pdf
    • http://broorybulldogs.com/clients/33993/File/pasidekoxenomolevozop.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/samatodipide.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=nutrition+and+health+mcq
    • 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_off0000d83f.bin
eba318392de63c1e9f070cfdd2f88466f7aea8805c6c0f6f562c9b3b94d3db58
pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 10688 bytes
font_01_sfnt_off0000f04a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 16792 bytes
font_02_sfnt_off0001085c.bin
173ec627325a33945b3727a539fb6613e84bc1fd20059427bcbae11f74c7d980
pdf-font-stream PDF embedded font (sfnt) at offset 0x1085C 17140 bytes