Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67f441d19ff41f6…

MALICIOUS

PDF

121.3 KB Created: 2021-06-25 14:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f86bbec1e2f3f7e772f53b17f768f1e6 SHA-1: 763f12c4cd39d87e113ef9a2f5a8726763df8685 SHA-256: e67f441d19ff41f642f6f1439ae643ee043b147f12818f92c7bd4d02fb3a886d
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. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or malicious domains. The presence of numerous embedded URLs, many hosted on compromised WordPress sites, strongly suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://bevelec.com/bevelec/dossierMois/file/34598145570.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093f361eac3c---33752857682.pdf
    • https://angkaganjil.com/contents//files/99002542356.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/c1c230cc0ccb5a7afa7c5cd5cd06b98e/35069252503.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/3tghc7viriaa4q5590riufcequ/jifenov.pdf
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rafelopupip.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6a9410c6ab326079c0cf2f8bf039825b/82826670806.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/648c69df2dd67d562121d3041b8d36dc/wobeduziwonuvo.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d858019b7---82752556055.pdf
    • https://radmangroup-ye.com/rgfiles/file/vozejomagogukurufi.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ca72e808270---vupasogosemeda.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160962bbfc113f---safamipiwelopem.pdf
    • http://szrealty.net/uploadpic/2021-5/file/2021052702150873499.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160780d4c758ff---durufexezamelope.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/2295340ff59adb0f747b312d7c10d86a/bewewibumakoxudevi.pdf
    • http://acril.ru/ufiles/files/sokodepifokefal.pdf
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/9760065544.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa999ba330e---lofuvo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=meaning+of+provisional+in+punjabi
    • 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
font_00_sfnt_off000156b7.bin
7559d201191838b2e3bb7aff9aa70a27630f66aa36487bae1bd5c0674032b2d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x156B7 10864 bytes
font_01_sfnt_off00016fa7.bin
f39b939bcc20f7235441b48e7128604f83e78c882f03ef5fb3bb9a2b2b346cd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA7 17028 bytes
font_02_sfnt_off00018891.bin
043cbd5a62346ea113d1f720b0a8b1b3d6e784459d3044556b2d8d18dd5a42ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x18891 21284 bytes
font_03_sfnt_off0001c000.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C000 16792 bytes