Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6fb399357aac03…

MALICIOUS

PDF

84.3 KB Created: 2021-09-20 16:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: df4cee994c889f27d5e286d975cf5a26 SHA-1: a8e33a6b52a0b063196b27d80bea2c60bc53793b SHA-256: fe6fb399357aac03df76a46d60c6677843aa5cb9cfa74f507de6238040d48d65
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Supply Chain Compromise

The file is identified as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also includes heuristics indicating it's a link farm and attempts to bypass security software, suggesting a phishing or scam attempt. The presence of multiple external URLs, some hosted on compromised WordPress sites, further supports a malicious intent to redirect users to potentially harmful content or services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://infrive.ru/uplcv?utm_term=apk+install+problem+parsing+the+package PDF link annotation
    • https://buyafranchise.org/files/files/99126392176.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/bijami.pdfIn PDF document text
    • http://popmetre.com/news/files/65750229066.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/85681783696.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/wilapivapofazojobu.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c408206a22---3700435057.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/90539862988.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/zelefulavik.pdfIn PDF document text
    • http://www.moyekolodin.com/files/mamimudepebekapolaze.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/23949772211.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/mutumamifisalubekejoraku.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/oabnm8umovd3vdm3f6ft5spcc1/48375142283.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfbb56166e---kukedurenaw.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/68682446463.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/45572666701.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/34313915996.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/gegasokosepawivimi.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/80568290823.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210916_145243.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/86993464008.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zupesozodojiwetinujagi.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/razopedeku.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/795niu3g104j7a2jqa97bkllh0/lepoxilir.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/37899269948.pdfIn PDF document text
    • 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_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 17712 bytes
SHA-256: 8992f95dcd279c3433633ed4d3a9dc6dd34064cd1e73f9c9f0219cb9e716f438
font_01_sfnt_off000111d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D5 11032 bytes
SHA-256: 361cede7bbd67e816f67c9affe8059bf248d59edfe262ca2471fcc74ed4478c4
font_02_sfnt_off00012b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.