Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b519616ad991a59…

MALICIOUS

PDF

74.0 KB Created: 2021-09-14 18:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be12b81736a9d57b9aa3d59ceb7e3569 SHA-1: 388483ad280f54a25914719e83fad8c792b7fd9c SHA-256: 6b519616ad991a598c6b15a32bf1fe7ea0ddaa3973316235cb6719fffc030a62
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or callback scam. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number for fraudulent purposes. While no scripts were extracted, the presence of numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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.
  • 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://ka-base.no/images_content/file/gawibumovuzir.pdf In PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/xebizeg.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/81854718900.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/78d2084071258248c1d5a65bf4e2125b/14525266917.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/82458044635.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/aae2df4ada0fd648111459cc5b5a030e/69061457743.pdfIn PDF document text
    • http://e-hematologica.com/users/file/85029843298.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/02/dadexokelijesoluluxo.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f08ee0c7c7---sizawipeti.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/ninomubabavowibulexamo.pdfIn PDF document text
    • http://arsvet.ru/img/upload/49711778674.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/1000154906.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0afovbrqa1n9ts3b2qd75kjr59/81225162779.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210914041230.pdfIn PDF document text
    • https://nevisnews.com/userfiles/14776414210.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/fowurozoruverulu.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/94602724130.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/42caa020ace9f8b4245e16b02dbdfb24/guxaxeduniniridinukadad.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/xewipiwi.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/gabavibopazenobuke.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/gexazinavawuvonolabos.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/pipedima.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132b843dcaab---zejazidov.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/93898918935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=andreas+studios+perissaPDF 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_off0000bc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC05 10420 bytes
SHA-256: ff20e69a2288f0120113e715775193eb2323f1b31bf3748d094904f44b6bda06
font_01_sfnt_off0000d3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C4 18784 bytes
SHA-256: bddf13d9665fc7823fd70077b1eaf1c24375ceab9b7b59315b48544c722f4328
font_02_sfnt_off000102a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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