Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe4b05a104b503c…

MALICIOUS

PDF

91.2 KB Created: 2021-06-30 01:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4459a129b610d936cdd93907b397c9f SHA-1: 395041d76694713618981c92f653c3a57cc78fcc SHA-256: abe4b05a104b503c49edf87f84031b6aa9d2855a69632714caf959f908b30522
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lure users into downloading further malicious content or to phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db9929e5736---pozave.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6b6dad18---nafiladalugemalazoxul.pdf
    • http://mtsskzy.com/userfiles/file/21105568591.pdf
    • http://dailycan.com/userfiles/files/banemapimadosunup.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4c7830608---78694570012.pdf
    • http://tfforming.ru/d/files/nanokekebaguso.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/e41b608eb5b0fab028e130b515c251c9/70043822123.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/2001f27a939b88952c7180f2a88b6c17/58121263519.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0757a24cd9---vuganiboruwamirujifa.pdf
    • https://legouic-peinture.fr/userfiles/file/30721153741.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/frv4dt50rel1nu2lc4s7n56b9u/femuniponirox.pdf
    • https://kede.org/userfiles/file/siburaredisasibaj.pdf
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/43123113653.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910e7c0de30---52592152336.pdf
    • http://wernitznigg.at/files/gakafemajedasojalefe.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608034abb517b---bekopufoxofesux.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700cf64d4de---pikidupavapinojuzeba.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/65851cad39ff77ada86ba3c25486e2f0/lisit.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac2f4d999a---fobuxixedefekufegalazazib.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a899aa6f585---pujazafedobikirojowogezep.pdf
    • http://schmetterlingsgaerten.de/file/24070933873.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041e71d236---62867881728.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f6c8648c7---jajekovoraruvotubo.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/d3898308e514c239ef2d0aeaa897ae35/45885591838.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160885eac459a9---75388584539.pdf
    • https://weeb.nu/userfiles/file/9506326493.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=rope+hero+vice+town+hack+game+download
    • 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_off0000f4a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 16792 bytes
font_01_sfnt_off00010cb7.bin
311240a8d0e96f587414f1068b0736eef5cd6fee416b140e76a6cfc9a6db2c49
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 11084 bytes
font_02_sfnt_off00012632.bin
6fe2eea61eba362929db7afbe59585c92c7b2f34e323020913a54e9c0b9aca27
pdf-font-stream PDF embedded font (sfnt) at offset 0x12632 28904 bytes