Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccb420682cb0796…

MALICIOUS

PDF

81.5 KB Created: 2021-09-05 13:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 254cd68952687964d248bbd5df1699eb SHA-1: ef0b68ded85cdb0852ca469e16e852858a57ba15 SHA-256: cccb420682cb07969ecd494b6bbb7fe8a389705383ca8582827c4d56933fd655
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting an attempt to distribute malicious content or phish for information. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/d6ja0uin314moc42ohr4gtsa27/lorisewipeluvorulolesepim.pdf In PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607320040fce8---24959816458.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/juvufetofumeb.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/xilulunapifigabukaliwo.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/sonegebop.pdfIn PDF document text
    • http://promador.pl/userfiles/file/64262036135.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/23746935553.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/tedodu.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/35751564957.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d1bf97897bd4accc9d94695774d90854/zaverasutudamebejisavev.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/jixilas.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/78846145932.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/39105649170.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/20628697783.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/63614930284.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b6f6e76a2---25606247071.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/demabesugojivifenilipogu.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/palovunazesugojitabojexo.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/5581af4f37097dc03b881001f9a55171/sapubakawumaxepolerovosu.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062923014235.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/74056551955.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/79228710748.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/xasiruvuzalizariwivutoput.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=healthy+recipe+book+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_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 10784 bytes
SHA-256: fe58728321a47a140fcb03d67077880b16ca66646834e5b804ea8d104650c3ab
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 17208 bytes
SHA-256: 61a599b49d8f2176a5002c87c44f67190b1b142a7f3e0c0252a9a476733f3771
font_02_sfnt_off00012071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12071 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.