Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5042fc57f3bbbac…

MALICIOUS

PDF

139.7 KB Created: 2021-09-01 13:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3cb512db295123819d427b0122c9a276 SHA-1: e8e43b846d155890685aaff761f0795bef110361 SHA-256: a5042fc57f3bbbaccc8e4b367b97222b5c912e0fb9cbc241dc0ec0e4a15eb5a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised or disposable hosting. The presence of these links suggests an intent to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=omeprazole+mechanism+of+action+pdf PDF link annotation
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/o3kbnkg7nh2qimc039me5i8e42/vamopijozaxatabifofexifuz.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf838d7169---33032762300.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/soxojejegigowozafinew.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/52733158934.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/9755567086.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/4n6nbn9hrla7mc6e751756rlj5/78948302279.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210831_B9DA9F45B221947A.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/vegeketol.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/19667374517.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae949ef590---liselopifepekuxaxizuw.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c391c96e11---82394613523.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a827f201a---tutufevixivezizabil.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/devuneg.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fe4106a86e8f64307f790c0b693cc51d/81860243198.pdfIn PDF document text
    • http://ogcdc.org/uploads/ck_upload/files/welesameluli.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/20047193328.pdfIn PDF document text
    • http://usateatop.com/_upload/files/21111160402.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/47520008836.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/reseviwuxi.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/87670460682.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbde43ca8d---49694084373.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_off0001c00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C00D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D824 10968 bytes
SHA-256: 170011473641c217fdf83a5b2d4e0efde42ddfdabf04eb4a00d6ba2e369f3ce7
font_02_sfnt_off0001f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F16B 17332 bytes
SHA-256: 67838c2b3aa9763a42281daa1f8405e7f55b7d42afa4674d06543736240ce3c7

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