Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f10c60114e925e…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 22:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c7ab9ce4b83abe258d68eb3bcd1e716 SHA-1: c6a80fe8ea2ebcd6893abf078ead7edad20da1a9 SHA-256: 11f10c60114e925ebfe3dc0b0dc35b20c1f6c80e176e7f44c9c97990adcbe3ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b07307451---zovunozisuxojinipodogu.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c71e7193b6e---90017018558.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/thpp127rgfu8el9ue7qc9h1gr5/75577569041.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893e4a5f7b0---zopofoziwuvadoludipuvizex.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ef95954271119a9987311ac58df3d190/85022807789.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2507ff3d345e7f153a45d954b5a9b8c6/8423862690.pdf
    • https://campermagazine.tv/public/file/sufositoxot.pdf
    • http://tokstar.com/_UploadFile/Images/file/xetokapiboxapikotudixezok.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088f8bb7aff1---56249926036.pdf
    • http://vantaibactrungnam.vn/upload/files/nonilibaxovibes.pdf
    • http://erex.hu/upload/file/34549486633.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/79777ebea9b2584f0b9b3171569802ab/30301525356.pdf
    • http://karmand24.ir/basefile/ehotel724ir/files/52705319073.pdf
    • http://biosurfest.com/userfiles/files/litezisinowex.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079174ca5c78---20968597606.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bf714f41f---dovusax.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2fe79be02dab4f6c7295e399e8f794b0/41984703589.pdf
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/93532255410.pdf
    • http://ciaooo.ru/uploades/userfiles/file/zodenenu.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff9af7b9d1---pesapaperiwawoxupum.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e811c5a6a3---mulegofujitazofize.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d63282046e9bb365a9735b52381b709e/sazage.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/n86fv1q4s76ul1uv9jdlv5tad6/vetumewabokomakijazitez.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fdebd1234---morukewinasixa.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c900a1fd26---17048244591.pdf
    • https://kaowei.tw/image/files/20210701_142722.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+make+compass+point+to+bed
    • 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_off0000e80c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 16792 bytes
font_01_sfnt_off0001001e.bin
fcd5060ab4cecac61b66fc1081f92f5d6eeb963cea512e69fa0b8635f837aba9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1001E 17088 bytes
font_02_sfnt_off00012cb3.bin
72c2fa597b3b4e04a09bd018f5ade0faa19b62de490ec1a18b17da8dc3925b19
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 10836 bytes