Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2803d622429592…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 14:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5ce714a55f3ea1b1045a79d11de783d8 SHA-1: a3e343562b287df0088ab2011775f0cd91461ae2 SHA-256: 6d2803d6224295925ff2ab253e9ec418ef00f6095ee3ac066a1346cb28b71db8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9978

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://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3c3015942c6805e59f889712d40a2781/32412802403.pdf In PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e099173b8d---mozulavexuwor.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/sukuve.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/kbnbh2dl7dvv0pt7jlof8uq03l/2243664323.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/bolivazaziribowi.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210528_31342DDE4D97DC8C.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/8c5b330716071aab2bff1b995cc61df1/tafuzazek.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/hieu7e6ses349tcjcpoem68lq5/17280530529.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/15176110323.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/vepevisojeb.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45577bb3ef9bc153e42a25ef5cbaaf2b/losarukekena.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/16099380638.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/7ae2f1efe1244bf0f9e1909c98306df0/15589242337.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/luwelow.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/35b3f2d23d68fd3ef9c6e735eab0b39f/gowoziferaziseduro.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/93748960665.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/ac6dfd9178204e0d6d0948f67e580f72/64028081591.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/76825843691.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/55764634255.pdfIn PDF document text
    • http://mlight.cz/archiv/file/dixiwepojutobixenazo.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4db65f529---divojeberanuxatedonivepo.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c78ab71f3---51566585463.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/33001162794.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-10/20210510074355365729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=direct+and+indirect+speech+pdf+with+answersPDF 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_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 17104 bytes
SHA-256: 6b4ec00fc5fb72bddb6e9b226314329155a28bb9b9a5b62a35baa5e7ef19004e
font_01_sfnt_off0000ffd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD9 10640 bytes
SHA-256: c7f8ddc394c37deb61a472a582247335d98e7ac3e9583053c046f3199febff9d
font_02_sfnt_off0001183a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1