Malicious PDF — malware analysis report

Static analysis result for SHA-256 19de4f7758319295…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 19:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ece2339649cb36c0b7d3bbfe10ce1dcf SHA-1: a47ad3f2d8137efd024cc51b8f058bc38a6f3d43 SHA-256: 19de4f7758319295a10f138913b71005ba6927a7df89295990ad6d308f35e176
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, designed to lure users to malicious content. The presence of multiple links on compromised CMS uploads and disposable hosting further supports its role in a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://karmand24.ir/basefile/ehotel724ir/files/fugegebopowixavodabusura.pdf In PDF document text
    • http://visit-pune.com/userfiles/file/95420344688.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/pozorolupivutajosud.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/19805422561.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/4429846273.pdfIn PDF document text
    • https://waroproject.com/file/tuditil.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6da3ae3934---44238012631.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d8caf36d1c1---ranikonalolenarobadoju.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/072bc40604cda1a15861f87cc340d1b0/88750899892.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/c451ab530e20bde023fe43526ea5a37e/lonimaxapox.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/82597434661.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/mejelonon.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/j46370clcrv6rakp4176ci1je5/22501267637.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1611beaccdd613---putirojukaf.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088480194d4c---84299583497.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/japolezapepefu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096d5c0b8c0d---26363477173.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/85047858027.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/86705592978.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/dopukabisewiwapevuvuge.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/813934797.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/0d6dab70322c0e12ce7a3d5c48c3fee6/55054144551.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/67cab4b41b665fec4414bbb4223c0d16/tilusasudopu.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/gudopo.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/65183917115.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608338111eb12---86399255387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ohsas+18002+guidelines+pdfPDF 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_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 11084 bytes
SHA-256: 35c029ce54d14d894a2386e9609229872c7767edf2b875caa30d64db4affad8e
font_01_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C75 17484 bytes
SHA-256: 94a942f3abc86da24ab43c0b86beecf471debadc660454ea8ce3cdb86a38f877

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