Malicious PDF — malware analysis report

Static analysis result for SHA-256 1238583d9c65a7be…

MALICIOUS

PDF

74.7 KB Created: 2021-05-24 16:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2730e17a7243183e1564440e9ac34d SHA-1: 7fd29904f4cbc01ebc9313644d15b1c2bac650d5 SHA-256: 1238583d9c65a7bef5ada1fc1bf58313bb40784f6bea9a4de437bd0298139985
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The presence of a lure related to downloading a movie, combined with the compromised hosting, indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/437eef41ff45b7e83b256594264f6367/22472028409.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/bb674dc5eecb0850b0014118701624ff/kokotogotu.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4c371d9b6---luseto.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160871bc5ea76e---29538841804.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/42b24586e4379ba8bebda1a2d7ca24d9/papozeso.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gsb4ql9sf3h18vbfcffj1mmgn9/japodepaba.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cdb23dcab---rimimewavefewi.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/b80d443e580f2506b7fc72b883e95051/bukamijezuxexogalodibob.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d75c5760d5---porolidaselisi.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/227tjh4ia6jjvc6122qaht9a11/tafekapevag.pdf
    • https://abugfreemind.com/userfiles/file/ditiza.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/1igdhldhs3681l4o6n051qoej2/65332140489.pdf
    • https://schmitz.cz/res/file/99517465656.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160841b3dedd3b---99224611502.pdf
    • http://all-pass.com/folder/editor/file/gewozifozejadisavafepit.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/ig7vrbp6qbjvkr20vo11kami25/lavofigoso.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/daba321009c3e30407d4f3a3364c24c4/nisaruwilutij.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079d7b5f1739---goxarilolimul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=twilight+breaking+dawn+part+2+download+in+hindi+filmyzilla
    • 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://scripts.sil.org/OFL
    • 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_off0000cefc.bin
02f5680648e9f778a382bc060cf473807aac1ca491b952808ed06f39367a32b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFC 5804 bytes
font_01_sfnt_off0000e2b6.bin
d5f09830ed5057fae2e7ed1b6aea0847aadccb18db939eb0c31b6c6622dce3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 10752 bytes
font_02_sfnt_off000107aa.bin
5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 16140 bytes