Malicious PDF — malware analysis report

Static analysis result for SHA-256 9003722ab674d88a…

MALICIOUS

PDF

89.3 KB Created: 2021-07-04 10:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6806751cb6fc97f45ea06603510a47bf SHA-1: f53f1fdfddeb687ff06da8fe66dffef4fc8810f3 SHA-256: 9003722ab674d88ab2954ca2f66d83860aa0b53d6475f366abc8ed229ce01aa8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content hosted on these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bebelino.ru/userfiles/file/mojovobipoxuweb.pdf In PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/cl15klijgiipqb18ciiq0d3ads/simetuwugebelisamob.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f4a03892862185d523a9d0d7c9f2481c/remijaxodivixomapepuvep.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210626_20B56C0F4AAD7AFB.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba96ca60154---lepefapejobebefilomagur.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/66227693974.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4ab57bb76---88621949139.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/15881288295.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/87119228203.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/somogodutavavakanomita.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/zofuxinewafemixifo.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3e8b01e68---nilumagenevefejadimi.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f390485d4---pitowakafugugoz.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b7686bfd---42061651314.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/nazexariropezef.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/2b6cde5e3021fc0025475e6f7b454f7d/48976256453.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a21820c1044---resolunifivaxusekave.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/33291565704.pdfIn PDF document text
    • http://innotack.com/userfiles/files/farekekobebipobaka.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14baeec859---89288420731.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9570f4242d9c15a532d37e48939abf5b/senuzisifinumi.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/59f7e4985ea2d00546e0166827561790/45867595647.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/dc0984bc880d4a84ea516731d491fd62/parotujilulonowexutur.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/kp2opk29f46s5p5221um3k9093/zabafomowofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=main+place+mall+moviesPDF 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_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11100 10396 bytes
SHA-256: 5b86841879b75993c25e03fc00073ec7a2c5e5ccad4829c64231d9ce8040b203
font_02_sfnt_off00012880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12880 18140 bytes
SHA-256: c662fa175d4387394c447fc000f092fa8b8fdb707803f238d8328bf1d5bdc063

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