Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db860dc6a51f5b3…

MALICIOUS

PDF

119.8 KB Created: 2021-09-04 14:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b8f149b4f86af4d4b7c15d5f4762e51 SHA-1: ec41c5e158f28c4c6714c751e7155e5d87ee8fb0 SHA-256: 9db860dc6a51f5b3dd10126eb3692747906ed679d1a39522812196c5ca6b6f4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://allytemp.ru/uplcv?utm_term=facilitacion+de+talleres+de+disciplina+positiva+para+padres+pdf PDF link annotation
    • http://tanphatinst.com/vietkiendo/upload/file/robovijujot.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/8s7os09r0kv7ts9is4d71fogop/xujogenogu.pdfIn PDF document text
    • http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/gozokofiveripa.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/gogepegodafuto.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/3153f5bbc40b361cd476eb4655dfb9ee/jovuxokusetavixenivir.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/57948883865.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/2svem8tvhc9dvvrhne0bomitq2/96331098007.pdfIn PDF document text
    • http://sns.hu/_user/file/48712042896.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/913bc4c8a200dbc65d4b0858562808f1/folizubifawajun.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/35632344467.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/6bdsdie56hitnlu9k00iodt0sk/romerujimigoxegu.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/68273890311.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/a69ca40a9731dd9b817a881ff93e2154/putudaxiduvavulabes.pdfIn PDF document text
    • http://santeh.md/img/files/281153749.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/55824578393.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/2810329564.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/fufozekevi.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/rutmmdf135vtqhtjnvemvb6mdi/46418030322.pdfIn PDF document text
    • https://iword.de/userfiles/file/milinimiji.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/samek.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe76815083---26289689059.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/78465861651.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16704 10656 bytes
SHA-256: a51d03400e94272fdee7d0be2d2ca75be0c6470e99fbc3eac920cef54a8f1da4
font_01_sfnt_off00017f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001979c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1979C 21724 bytes
SHA-256: 0e3d9d3b61cd5c17f4728df48f5de5c8ff1a8c4235396a5229532aa7bcd20362

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