Malicious PDF — malware analysis report

Static analysis result for SHA-256 6206753cbc63594e…

MALICIOUS

PDF

91.5 KB Created: 2021-07-13 23:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 73b92d82517f306502d44bb33a04ad9b SHA-1: 08074e89878919b667c2c407e89ce7a479094b39 SHA-256: 6206753cbc63594e2c2c66acac9bb1312317089dc53dfcc1bc5fd8394739fde5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it is used to distribute further malicious content or facilitate phishing attacks. The presence of external URIs and links to IP addresses further supports its role as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607926c9bfac4---kigefitaxaligagogon.pdf In PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b489d549051---14035528998.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608388072cb63---kanobedumosufuwisu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722d9c48e6c---58490326353.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/egsv2243d101g9v33qlgcv6153/pugorexugutuxubusenejotir.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/65318796584.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160735cd5e9048---pafepaj.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/vrk5jtmgcf4d4rd0p4nje8vng9/8124096319.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3e45f793ec1e8f2f2b48ef41836ceb17/14388193458.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f385f82cf7f4fc345dfe331a802a9911/41655951752.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/30148087369.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/puxomosikafewizuxe.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/jjn0e8i656up3j89vijk0s3ba9/74038709814.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b62f48d26a2---92847022190.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/20c1690003ea262606dfe9d59edc9e4e/rimodiwu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9c26c095f---56968313452.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/wokukodonuz.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/65805072836.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/xuvotopojegawax.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/baguzasotuxopot.pdfIn PDF document text
    • https://somogyplusz.hu/files/48781794038.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/89999533144.pdfIn PDF document text
    • http://envigest.cz/upload/file/kurogalim.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a413671bcaf---49460660734.pdfPDF link annotation
    • http://tevukasveza.lt/ckfinder/userfiles/files/badorot.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/60539848644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=list+the+stages+of+meiosis+in+orderPDF 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_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 10712 bytes
SHA-256: f06472e9b8b75acba2fb00dda129041b0549b9d0b3271591f09de16a5b0cbe23
font_01_sfnt_off00011b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2A 16792 bytes
SHA-256: a33757fb5347d7e9821fba645e66cc215ee798cf42c43cc72ba4594864a77ddc
font_02_sfnt_off000146f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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