Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29bad37bdabfb92…

MALICIOUS

PDF

82.2 KB Created: 2021-09-03 03:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 404f66e9cbdb6f67cad4b66aea64d61f SHA-1: 4688cfc738b81617dc69cb247058f52756037dc0 SHA-256: d29bad37bdabfb92d9048f4bbd12178bed3c954dd078eadb8623bd1fbe74a359
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or credential harvesting campaign. The PDF structure and embedded links are consistent with a spearphishing attachment, designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://allytemp.ru/uplcv?utm_term=que+son+los+valores+universales+pdf PDF link annotation
    • https://bnbcostaverde.it/userfiles/file/56364534926.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a5d7551cf---pasozosuzifan.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad929c942bb---lovefubonitujof.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2fb5ef440817ac2d5af6f29dd4e68bf7/jesesiwabiz.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/nisawavuxinisedemovebabe.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd5dd3c20b---63001950347.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/b539f84ae374959143051f4db5067fe4/75448133469.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/padapuxejopupaniruf.pdfIn PDF document text
    • https://combrooncom.com/contents//files/zovotuwo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5ff189d0d2dfaca063c786ceb180909e/14391185359.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ab4d46c43394be294fecc5bd0c7fd314/77706864949.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/vutitemaleloredikovebud.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb647a3193---seworoxuvelonafo.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/24im6ld5t1c0dhlqn8k5ut1h1u/97169707615.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/13891485235.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/71256779795.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/5ced1e69fc11c371074703ca30e64a20/valudosewakiniridi.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pcr1sbiqol39cs1jhk89jrgkal/jewosiwiwawonoxirivosodib.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/be4fbd909a5ce8696b639ab3adc64b98/midapofowadop.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/1dc51ed8600f97a75a83d119f3abae30/xularovibezewivanufunano.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/mapelimiruzuxokigofuzo.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2201f65d765653851bc8af4ee8035b64/24531465639.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/12b61020dbbe4e9aeb3a4ec6c07bcf93/zipizebebategejodotafo.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_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 18300 bytes
SHA-256: a04e2427b126686d67cf36946c1516949586be72964b7c0a9dac4cbf5cd524ac
font_01_sfnt_off00010aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BE 10620 bytes
SHA-256: 1d5cc6c67bb777f13434ff53933d8035285770c736737befcc7cc5436bab2580

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