Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb2e4e084fb3664…

MALICIOUS

PDF

77.3 KB Created: 2021-06-25 19:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 781c7496faf07dc8434c353cf7d85d60 SHA-1: 50f86782290974bff16df7fc8288c3a5e13fcfdb SHA-256: 0eb2e4e084fb36642587da89c181d7ee2c781df439a0acfc89bdde1576bb2c3a
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_FAKE_CAPTCHA' indicates the document presents a fake CAPTCHA to deceive users into executing further actions, likely to download a payload. Numerous URLs pointing to compromised CMS uploads and disposable hosting were extracted, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=mouldon+hill+country+park+map
    • https://kurtoglumob.com/upload/file/nurakinejenewiveroru.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afc06dbdf58---39430794618.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/10e179a403337c958f2fe772835a114f/40134289619.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0fb0ad7522b00a12c309ecd135883d91/42449079011.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609279f104cc8---gafemud.pdf
    • http://157.230.241.115/image/upload/File/goloxomuvim.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5e7f33f2---57775094393.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/269aa6489722ed39b2c08b1d19c6d274/rafewoz.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb4c909a8d---zelokonolekifufiderid.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6482709fd0---63768186338.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d329c5adc---98960706409.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/auhcjkiaumhr6ig7mlbifpc74i/50253464230.pdf
    • http://scheidenschiedam.nl/uploads//file/nuxokidotodu.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6k96ogfln8bcls5rmd3r7098s2/66386516646.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6bb7ca0cf---76117418611.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160822a62c7abd---7876021956.pdf
    • https://betenenergy.com/sites/default/files/file/30370250360.pdf
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/dde6f016a33fc7dd8a4735af29246a50/49927870102.pdf
    • http://madmojo.com/fckupload/file/dejiwukogagonakovupab.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ce115f2c---xasegusegewumokedesodi.pdf
    • http://cuanhomkinhtoanthang.com/media/file/44189294232.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/895845da5911cfe8e86183300cd0158e/74622947795.pdf
    • https://avgdesign.com/userfiles/file/ginitodafidoke.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_off0000c810.bin
f74a4d7f95dde0da8439ec5c944963c026e2d6d20a9f42327fc34b845129d981
pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 10780 bytes
font_01_sfnt_off0000e0ae.bin
9fddb114aaae8d0995a2ba4a9810b5d5cf204d5dece269f8c1c9291b220e7aae
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 18144 bytes
font_02_sfnt_off00010f9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9B 16792 bytes