Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac38ea9d719e61c…

MALICIOUS

PDF

73.7 KB Created: 2021-07-28 07:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0f5d2c971b9215af2e8b6c1b9ec0d538 SHA-1: 0d0f2e34dbf661a38367296ccc69b2e635d4ad23 SHA-256: 1ac38ea9d719e61c53252873fe10fe657749cc507bd6e8e9a271557a473b6bea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS uploads or disposable hosting. The presence of numerous external URIs and the overall structure suggest an attempt to lure users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/sogejonivexuweziw.pdf In PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210605_9F81B1658348EED4.pdfIn PDF document text
    • http://wirheiraten.de/images/file/duzekonomiluxaropibuw.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/94773238624.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/63280451900.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073af521c0d5---jupudamodedewimevamutexe.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021051820094348.pdfIn PDF document text
    • https://activepymes.com/pub/file/xutugexepa.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/80596567856.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/tl77dvo8gfuj3n80pvl5jtbd06/8198875311.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607556638911e---93509099676.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/48006869800.pdfIn PDF document text
    • https://ka-base.no/images_students/files/lexemuzulatiz.pdfIn PDF document text
    • https://actorconseil.com/files/file/jefodinejabukujozuvar.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/wawemisavegebeva.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/31921617315.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607885db3fe7b---96888987547.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8345_20210518074715.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/245da5f28d5281a98f6c89c7f9222173/96639734159.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3cc261fe13---98879642175.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/vajojumivozufuzeturaxoboz.pdfIn PDF document text
    • https://sanidom.pl/img/file/96965602029.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/18009924594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=singer+328k+service+manual+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

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_off0000bc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1E 16128 bytes
SHA-256: dc075448143e28199ce7674edec2f13ea0870fb51b0f3d7469e8aed5e6c4ad3a
font_01_sfnt_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 11580 bytes
SHA-256: 0343b121e29f022045dc7d0af57b89c3f27251a1f64b1c4c185e338b23b0636a
font_02_sfnt_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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