Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c3c9deb3c986dc…

MALICIOUS

PDF

73.2 KB Created: 2021-09-16 02:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a7be1ff88f6a30079305b14f8a938d48 SHA-1: 2e1b072494359a4b3accb25b7463fed13b7969e7 SHA-256: 74c3c9deb3c986dc7e4a2a3340e27b5901d20aa0772de6456692e9ca22562fa0
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and link farm patterns, directing users to compromised CMS uploads and disposable hosting sites. The presence of 'LOLBin token sequence in document text' and embedded URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=animal+face+app+android PDF link annotation
    • https://redengewinnt.com/userfiles/file/1957694648.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/20659178067.pdfIn PDF document text
    • https://buyafranchise.org/files/files/vesixanesimizaku.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/sixoposojegudizub.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/71641475328.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161355eb2bcd5f---12812285387.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/pawopaba.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/noroxam.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385e4f8ba0a---jigusenamugezibijelajavo.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/towexevenifeno.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/31293745106.pdfIn PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/68830190324.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/55911611739.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/rakotomuwuloxadutiruru.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed63bd83a3---xosebalukalomiragogogumi.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/50016856381.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kivegabekozamizivajo.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/62599475735.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/77593273009.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/71394875109.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/judelatop.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbc6cc5370---59898630727.pdfIn PDF document text
    • http://lookupagency.es/In macro / runtime command snippet
    • 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_off0000bdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC6 16224 bytes
SHA-256: fb895ddc0650ebca080302ab9e08b96148ea6d1ef3b1d81fb83a9c02f3bacb01
font_01_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10496 bytes
SHA-256: 0ceae2353c667b22bd209c7aa67491268efaa73dc26e1aeddfdf7705e825671b
font_02_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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