Malicious PDF — malware analysis report

Static analysis result for SHA-256 288eacb6b94a9b8c…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 15:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d85e1dadf5e41c93d3e299fbaaf4272c SHA-1: 7b17ae5c80731e8606650df4074a8b64d21d3667 SHA-256: 288eacb6b94a9b8cde3f270f88b53098badd6c57a666e64fa673a392cb782a41
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external links, several of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • 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://lnianemarzenie.pl/userfiles/file/fibavamajavaburadoguvan.pdf In PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/9862550946.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614006e231d1c---pikotivurodaxeludopogudot.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/25780991025.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/6071361997.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/kebakorasetelewomewegif.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134c31e63775---wuxanokaletovijadumafiza.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/palozepudususojitafivu.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/fofulala.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/pasewuxixalit.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/61725600013.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/96682341893.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/jezavajosuporug.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/pimetazoko.pdfIn PDF document text
    • https://preciseenergygroup.com/media/muwolararafetivi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613860a9f17d3---21256580688.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/judosilaroninonisu.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/17001487329.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/f736fc0e492f5d1cec277ec78996e3fc/tosemapalozoxovure.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/titobusevigonukavulukal.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/titobulaken.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/rixigiluvul.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/gekixefef.pdfIn PDF document text
    • http://staropolski.net/Upload/file/rokekepasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=superimpose+apk+2021PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 10728 bytes
SHA-256: 6aae5efa5c91b7d514febaf3851f1ab9841cd26ca3e4934e19e64f997df83e1f
font_02_sfnt_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 19864 bytes
SHA-256: 15fa075e894f6d3d1382bc9969cb54793936040b27cc60feb235bf9ffab2dd4b

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