Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95999b3faf1c2e1…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 05:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30d2bb6ee289fa821f278598ae49fcc4 SHA-1: 86b800500d94924965cd7581d2ff077389923e88 SHA-256: f95999b3faf1c2e14fd169a5c8c3b105e92d694516ca308ad8ca1353fbcb7c4d
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, many of which appear to be WordPress installations hosting PDF files. The presence of a 'download' button lure further suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=the+attack+2611+full+movie+download
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701f7c2096f---64711908147.pdf
    • https://alsharqcc.com/userfiles/files/zamizenerolir.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4b763254d---mapexopurojetuj.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0b38936a61cfb9807b196838829bd4e5/kesiligezazilej.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/srricorvmr6ao0kfboi4qe7g25/dodakovalokex.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/2h33hq16ehgiqqe1k3k8t8f4m5/xugeboworimekilif.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/ximudopopumarajop.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/kodabawizupubudok.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/8cf05b3e14533a6e5415bcdeb006d187/jivuso.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/29a2b264e1e3cdeeb63cb139132b7d51/tabuvowegupavefate.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7506c260---23533629429.pdf
    • https://leganordavigliana.it/uploads/file/65513011417.pdf
    • https://arvikabc.com/images/uploadedimages/file/13592060953.pdf
    • http://accessoriesunlimitedinc.net/catalog/file/72455895308.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/c3jldf5h1r3pu0qi82gio2js81/44387272850.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0d82c7142---12850747764.pdf
    • http://aktifbant.com/resimler/files/vibosomotak.pdf
    • http://munsusa.org/userfiles/file/20210524213800.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/eva5messkocgoep4lh4fda1al0/kuxafulekigow.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608134e7c7026---ludesikanirifosetuwig.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/1fd1d71c42903b64e8bb38cc820347cf/lopakoripafujevevogifir.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/31ffb332e29085e5d2b26ddbd22d8c4f/42492758692.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_off0000ef4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4D 16792 bytes
font_01_sfnt_off0001075f.bin
3e249d83f048c7e35933541b8371c69fcc2945255c71243d0bd2496b9c8721ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1075F 16816 bytes
font_02_sfnt_off0001332e.bin
4a5f8b931e1fb4bcabfb9e29905096bf5544f7999dd6564bfd281fb4cbb388a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1332E 11120 bytes