Malicious PDF — malware analysis report

Static analysis result for SHA-256 0192c6b07a4c3fa1…

MALICIOUS

PDF

85.2 KB Created: 2021-09-16 00:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 29065eb559f4a8c898bf2df01dfad36b SHA-1: 6081d7f00b952525c112e0eefa85e474b7b074ec SHA-256: 0192c6b07a4c3fa1829343a0586db9c3e39fa963fdfe0b9aae1418a4d8945ff0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially harmful external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://medvor.ru/uplcv?utm_term=after+we+collided+2020+123movies PDF link annotation
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210904101436.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/zerajuzuzanozof.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/bokuwuketog.pdfIn PDF document text
    • http://servmed.net/userfiles/file/rofajejuleliwin.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/xiliduzotogizudaf.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/560fe4e607fc9f9a853f7ffe9e5b8192/watugekoz.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8c2879a4ca04de7d20d92f87b056cf6/xikupikedokajegurufu.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/94439814049.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xawig.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/53310186106.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210910023009.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/25463728452.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/e04784ddd4fe283f6adfe412f218fdfa/vasevefudenupi.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/97560691210.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/nisanabovi.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/37372732606.pdfIn PDF document text
    • http://mayjack.com/upload/files/40547009145.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/nafulavedesowomoli.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/85879358116.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/tuparapiv.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202196754488345.pdfIn PDF document text
    • https://ghnservizi.com/file/5416588415.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff7b4409a5---vodafi.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/76449025901.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_off0000e85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85A 17332 bytes
SHA-256: 06b4b9ee6742ab9f8b98cfb460cc0f6cdbd1348658ce58a5a2737380fe9da54c
font_01_sfnt_off00011553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11553 10972 bytes
SHA-256: a1d6636aca1f8e91612f717380a6e499f47cd4ae446c5dc888163b9be3d84d25
font_02_sfnt_off00012f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1