Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c116a5ec8218390…

MALICIOUS

PDF

69.0 KB Created: 2021-09-17 07:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bf0d2ccfcfe5bb4a5535bd421ccc6092 SHA-1: 0d036e940d7bc6166b6f003c373a63d4da184894 SHA-256: 3c116a5ec821839064d95627f688d85a98987c42428f987ff400b98ff3b0e8ba
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://maasmartcity.com/userfiles/file/guxiruzanodajovepejene.pdf In PDF document text
    • http://splogservice.ru/content/file/vajevav.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/gamal.pdfIn PDF document text
    • http://newworldss.com/uploads/file/dufapurugodi.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/tojozilibubetugebepuboba.pdfIn PDF document text
    • https://paradigma.bg/uf/file/pekigonoluxatibul.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///gumutafiledapog.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/11931140274.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/68935412171.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210909040331.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/goduzugitasifewubeve.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/panewozakeputet.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/zuxefajavelimarawiwarito.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/62647871642.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109170955505576.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2d0b00fce---65880801110.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/27211060305.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/fuvagudepuzezari.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/96507449635.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/82343892323.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.com/userfiles/file/95875738906.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/280792185.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bb2d0e2f9---taporidub.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdd7c11111---77284571550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=war+of+the+monsters+ps4+cheatsPDF 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_off0000b03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03B 10680 bytes
SHA-256: cefa659d6832880d52b1ea44a84be91e70799e882795bf825f44807e47278773
font_01_sfnt_off0000c89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89C 15060 bytes
SHA-256: c063f7ffe947dd0db00ca7d5aa0c0566cebdf4bad26c848ff1386f171614935e
font_02_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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