Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e0238add493635…

MALICIOUS

PDF

85.2 KB Created: 2021-07-06 05:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0a3e909a1550685eea45c1d0b93dde7 SHA-1: 3921b40bc31bca571771d415a0bfebed51792677 SHA-256: 47e0238add493635ef4719d8927da405a04bcefdfac32adc18a853d19204c96f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains, likely serving as lures for users to click on malicious content. No scripts were extracted, but the extensive use of external links suggests the primary attack vector is directing users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://synerhu.ru/uplcv?utm_term=latency+meaning+computer
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d40f247bf915e5a893f2b3ed178f5ce4/gusogobaje.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091af475ceec---89077660630.pdf
    • http://0965818789.com/CKEdit/upload/files/verabufevep.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2199c99ca---18962244159.pdf
    • http://inse.us/uploads/images//files/biwemedezuwi.pdf
    • http://abogarestudio.com/userfiles/file/gevugemijanotabewinon.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/0b0586b220047564a4fc1d23ab62622e/tedadirikoki.pdf
    • https://vieclamxaydung24h.com/upload/files/vibinazudidezokuvapevil.pdf
    • http://thedreaminitiative.org/Content/Admin/uploads/files/zodunibi.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7225e4ea686cab9e0c81eb5cf0dc41e7/45484548658.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/69e7a5648147caed6e0353f6bb48b492/kexeduzuzutudex.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a9cda415c---14463994982.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b873e732504---dotepemuk.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1440a087e---sapoz.pdf
    • http://bidmitt.com/img/files/file/51987362746.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2hrtm4297u5k0fcqklpv3blcvp/sunesoligowutaza.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e59d5fa8---kuxitemowozafe.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/7ffdb12ab69dcfb07670965b36dc0eda/satoj.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b6c6047bd---86215157015.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/63430fee830e8a2dd5c2d1810ad174cf/65792194405.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0b09b5c97b1ff822dd24a8ace3ffe9ae/kilaliw.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfc88e8880---xitivitusagaporomu.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/gimebokoxema.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d6.bin
1fd379ef78b04840f3e229c78e688511129d30fc806f68363fcb234ebb15fe60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 10676 bytes
font_01_sfnt_off0001014e.bin
adef3de1b31072b1342ecb89a65caeae7bc98f7ec40a4a90b1813b3223a13d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014E 17136 bytes
font_02_sfnt_off00012e09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E09 16792 bytes

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