Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d539790c520067…

MALICIOUS

PDF

89.9 KB Created: 2021-07-14 03:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 24d493f2a5ba66878006fb5aa2d78b0b SHA-1: 674e4c1d05adbe684a10394332d8d5f2be1db246 SHA-256: 19d539790c520067f4264d17486c6ec73d3baeb485a4e9bbdf8dada24d4b3659
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm strategy. The primary function seems to be directing users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://archism.ru/uplcv?utm_term=lads+gym+workout PDF link annotation
    • http://e-hematologica.pl/users//file/88210066757.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/13549572489.pdfIn PDF document text
    • http://mebco.ru/images/file/wimivajip.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/12556937477.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/07112e302181b212a7bb30ee094a8443/mowaxovotuxeleres.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/2840a9aad8298952ddb6fbbe823aaf59/xutubowuk.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/29982614137.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/59378823188.pdfIn PDF document text
    • http://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/majefomuzanajojow.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6ffe5eba8---jipako.pdfIn PDF document text
    • https://x-software.cz/data/file/rolidogeririfewugemiwor.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84607ba826---rivoxezesuwolariku.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ced462b11---30753870467.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/mptdp06622tlek73oudchrchgg/jogewujolemikosuxanem.pdfIn PDF document text
    • http://texmet.pl/userimages/file/gabubapinakamiminawe.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2c3c85ff0---dumoxewe.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/pudebekunotagedetezivom.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc85d878d0---96076835542.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/19409348280.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e6e7964e078e3d0961a546baee3b1248/soranupufuwog.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/zamorenovawe.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/ramabeseki.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aba15fab456---rolisajupafelitoriv.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/149307541.pdfIn PDF document text
    • http://polletnv.be/uploads/files/dipuxibepapotegozojudireg.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/20af37a913c9c0701beb14d8e638a0d7/42200831504.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_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 10564 bytes
SHA-256: f2188a66fccec29553fd7f9f74db945f3ff0d32f95ebc393848026929a829323
font_01_sfnt_off000113ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EE 17768 bytes
SHA-256: 97018cb21694ba6f0f0655164bcf871d1a51f377b2ac93abca4b086040113353
font_02_sfnt_off00014223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14223 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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