Malicious PDF — malware analysis report

Static analysis result for SHA-256 422b8e6078695d64…

MALICIOUS

PDF

106.0 KB Created: 2021-07-20 03:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4daccf4fa14aeae4c309f6039c08e37f SHA-1: 1a9a86fe90f2bc9616cb3b4d4e6fb2ade50885ad SHA-256: 422b8e6078695d64da4d3e1d78c01a312082bac85992d67e63468bf4df9223e3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/ug2igo06qc9l930rn8eis55eb7/dunipanonozimof.pdf In PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/205bb07792bbe29725a26cd73fa490f9/9127090651.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/tuxubudagamuluv.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/kcialt2c27l7e53kc5p6vckd4k/difisavodinisufideve.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/pisenil.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070ed9c848e7---goxumepij.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/30330247607.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/49878204364.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/90577384544.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/44c17f0b9df9989885a5027f27b18a87/sagev.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/00c4c5141f045c9384cc197721027439/kekitotakitezikulagele.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b584cb4162a---gugifokeponekatope.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874046a464b---45784534552.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/33069478279.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160f1168ac7049---79082335641.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l22v6cf9ab5uqjodf75ge623v9/21466607471.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/rodiduzumuzarisetifam.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/f81127635dd56f79fa20416c2141645f/jivaxabuxawaj.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/bfsc1shuq8fsvh12jjrrvf04bl/jevikefugodawukekozokisej.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/xuxejipijalesepugotebu.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/forosa.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609408a7ba9c9---goguxonak.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/gexapomanugan.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/tiruxefojimese.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=influenza+is+what+type+of+diseasePDF 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_off00013bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB0 10804 bytes
SHA-256: 808277a243eafcbd409b244d43aa9efb27ce1686a37a35c13c88afb742aa572e
font_01_sfnt_off000154a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A1 17556 bytes
SHA-256: e5aca3aa8c06c84b0b6bc6b9cf07abdedb29806df7473d00eb8133aaea326451
font_02_sfnt_off00018276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1