Malicious PDF — malware analysis report

Static analysis result for SHA-256 af20e12214a2b71f…

MALICIOUS

PDF

91.3 KB Created: 2021-07-06 05:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c015b6c594446025cd3c97750b77720d SHA-1: 5a9f04ff6239663330b20d940b19600ddd523536 SHA-256: af20e12214a2b71fb5a26ea98d492fd1d9dc26a842178431a0f8f8fb7974163c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to potentially compromised WordPress uploads, indicating an attempt to host and distribute malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic of encrypting payloads to bypass gateway scanning. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7170c12fd7---42058133468.pdf
    • http://4reality.cz/userfiles/files/nefilonerije.pdf
    • http://absigorta.come/file/47386513705.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f81ba2e733---92426995546.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/tio5572vensdcjmfo4rfdh8mi8/61108026596.pdf
    • http://hubbardfamilycircle.com/clients/62940/File/53509571277.pdf
    • https://eobliecky.sk/userfiles/file/porovokixowugidexi.pdf
    • https://fanaf.comarticle_ressources/file/7256322983.pdf
    • http://drentmedischadvies.nl/uploads/files/65327350098.pdf
    • http://kingsauto-bar.com/js/upload/files/66648412309.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/np57ufc22cbvmbm6ft5ibe3r88/70814352278.pdf
    • https://ratco-hardware.com/Ups/files/jelobakududebipakaf.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804970e6699---tavupavibabazu.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c47085f88ab49ae3737dfde0beac3cb8/62419931431.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4b895c93582dcad96a9d72287d1f8d3f/70658012658.pdf
    • http://timeyear-v.com/userfiles/file/piwusijuzimiwiv.pdf
    • http://riskhedgetech.com/uploaded/file/1927643535609f4716538ed.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d76545534c24d0b2e46e858765d7de30/sesugosewexemik.pdf
    • http://offerseir.com/basefile/offerseircom/files/41806762323.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0ea9ba1c0---83270906096.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b951a64016f---70197477928.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gta+san+andreas+extreme+edition+2011+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010c40.bin
85c9e455f2a36b66b621ce046d427c8e9ac7a6ad57d1777eb59bdd5e65012e3b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C40 20440 bytes
font_00_sfnt_off0000dee9.bin
e5c0ef61184d06a368ecc6810c65fd0b933b2f27fd9d025e1b15ddc7929cacca
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 17356 bytes
font_02_sfnt_off00012dcb.bin
7a31213fcaee55ad800012330ba54006a6011b849ff38555ad286479fc254309
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCB 10928 bytes
font_03_sfnt_off0001474e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1474E 16792 bytes