Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea6061d37c7b324…

MALICIOUS

PDF

73.2 KB Created: 2021-09-28 20:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 754f5209490592ad8de7985c814dc05c SHA-1: 93f929d49636d7659a512acaec8370e9c11a4348 SHA-256: 9ea6061d37c7b324525302320040e63383f87bc843b2d3c132dd243223e056c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm patterns, suggesting an intent to redirect users to potentially harmful websites. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ketchas.ru/uplcv?utm_term=mx+player+iso PDF link annotation
    • http://www.coverseg.com/uploads/ckfinder/files/puburakivutorito.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/5907816499.pdfIn PDF document text
    • http://freeorden.com/media/file/metajumuzuvepop.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147e9ecb94e4---73715629560.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/35319478112.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/ligasewenofidisew.pdfIn PDF document text
    • http://naylorrealty.com/userfiles/file/jifefeverolaxejexixowul.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/63183430687.pdfIn PDF document text
    • https://pcetravel.com/files/file/71088040493.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d03c6c041---juboxokatufojadatefo.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/valelibasuzemupadako.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/vusiwusivizekezegosupisig.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/62369519809.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/15334725607.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/9489320333.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/wutafugipujarewewu.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/lamedajulu.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/zixofaxinogezofer.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136b02729877---rigidibogitagusepuzatetis.pdfIn PDF document text
    • http://3q1p.com/upload/file/210922090205529001gcw6nghvi4oy.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161420be1d23ff---48517430230.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/45213497613.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/wurunimujarefuvekemor.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c87460ae0dd149759f0253dd606257a1/tapinewewodafim.pdfIn PDF document text
    • http://word.mn/uploads/assets/77673272624.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_off0000b514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB514 20048 bytes
SHA-256: 1cb01f5df41cc977beb284120be861720b83e92bbfafa3de3085ef27d29c5e2c
font_01_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 10252 bytes
SHA-256: 9e175a75082f74564d5b08dd61e1eb3e21257de66fb3025b41d3af2b1709b6b4
font_02_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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