Malicious PDF — malware analysis report

Static analysis result for SHA-256 94617fe29742ba3e…

MALICIOUS

PDF

86.1 KB Created: 2021-07-25 23:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5281b232772491de99fb0f004051b537 SHA-1: 122be81b9223768facf2ec93128052a01175b519 SHA-256: 94617fe29742ba3eb762ece3d4a96971a0cf24ffe2f4ba4d91ea93870c324941
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the detection as a phishing trojan indicate an attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1bd65fe9e---49484376217.pdf In PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jatogowi.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/lunejodumubaz.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/tiwatuveporajulaxowugigi.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/56141665194.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/xudapaxa.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/b161cf70fb21ffa080b1e873e25a882a/29499189828.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0sme81eri33kerq9hbfdbtlk02/sawipixovimomobo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/8c8d615c7adf3190aa819f8ec949c795/90354634411.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/gomonelazivafovudegutive.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/keleninizabovamoruwumed.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/60152118521.pdfIn PDF document text
    • http://wirheiraten.de/images/file/48117731999.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/vevopimakib.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210517183409.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/42994763043.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/ziwafumagina.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ni5eisluj3eglcoui4vrubl4a5/48818804758.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b7d00b489---55752648164.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5317ac50ce---butuxoxewokovadu.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608615fea1022---jometasixasabuduroxibob.pdfIn PDF document text
    • http://kajsanordstrom.com/userfiles/files/85846770762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=movimiento+rectilineo+uniforme+ejemplos+y+formulasPDF 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_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 18488 bytes
SHA-256: 6fdf899923e3fe83616feaedc09e167989a58b4ef583c0e2ca2941c1e9f54900
font_01_sfnt_off0001165b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 11044 bytes
SHA-256: d831314764f0a65c75c726eb61145768752589eae9223917de6696cd15f2515b

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