Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc2db78891bf6a0…

MALICIOUS

PDF

86.3 KB Created: 2021-09-13 02:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: adb42272fce6deebb90b70b2dcfe45fb SHA-1: 56e7e3d7fd869c25ef1e142a55d75f0278c01450 SHA-256: fbc2db78891bf6a00ee1ae2b0666c20fa70794dbaaa67946e02eba3b7b2c2cfc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://xn--e1aazeoc7d.xn--p1ai/images/shared/file/zevudonal.pdf In PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613862816441d---32842708217.pdfIn PDF document text
    • https://proia.bg/userfiles/file/806765929.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/radorobigosezeko.pdfIn PDF document text
    • http://mopron.ru/upload/files/87645392376.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/70564656882.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16136643507fac---36778523961.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/23126934e30cd7192aaa306003186dc6/develinixowaxuvorofe.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/noludubosirojozusika.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/39798723180.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/monoto.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/68687361462.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/wemepigaseberadukedazo.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/lafimopimowetopuru.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/24562067179.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/39465449444.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/sevewefojewimozife.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/jurimuxixawajaf.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/tolajo.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/semuxobuxeran.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/neloloraralowenupatovo.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/0a45499847f87c42beb6214f9b49f8c8/2168664699.pdfIn PDF document text
    • https://matricula.arendic.cl/files/86763136577.pdfIn PDF document text
    • https://laser123.com/geektic/files/bamavugepevixugenu.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/baxudapuwuzupazibelubejux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=gingerbread+man+story+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_off0000e403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 11088 bytes
SHA-256: f615d399227b3f7925cf068c4ae1afd77964ebaf0b5bceee25940c528fa072d9
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 21332 bytes
SHA-256: 7c0afe3a04f42366698cb45370efcc14be62acbff6a0ce17fee16c7a16584ff7
font_02_sfnt_off00013331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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