Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bd918470d5a1b0…

MALICIOUS

PDF

84.2 KB Created: 2021-09-06 22:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1cb1cb8db659bc781ecee51afc7c5d1d SHA-1: 382b070d2147d7692cec26f9513d7d2765cddcdf SHA-256: 42bd918470d5a1b0f5e8a739a0475c732bce6dd4341878ff95c60a14b4b8f664
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of multiple external URIs and a link farm indicates a likely spearphishing attachment used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://goozzl.com/userfiles/files/27500618667.pdf In PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/fqi7oanu5is8lr270ohoefn47d/94685888637.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c064be513a---68514428113.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/33b1cf86720e927f61708891b105515b/5575457384.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/61689623970.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/80d894a4gn90o4rdc699toln04/43304435846.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/c0c81599711df8b291e2b70fa60cad4f/ditagitevejizabupod.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/1759401663.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/kezozorusojeminasuxisiki.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b00b08b2e76---87987474268.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/92955576209.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/4437bc678003a2c2e39cbd7b3acf2a72/46075697440.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/cd092dd619696da2e9932c517e7b762f/bumojikoserabujofisapo.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/bde6b22010bbefe110c937731e9abf3f/43940619964.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/keligoduvewaxovamelabeg.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06a9a07403---94329243061.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/fumomiwivajumofofagadig.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/ec2f45e3e21ed38bee6f191efe64936a/86302845892.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/e253b609ff001ad1906618c1bf713b10/84903203044.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/wituwupifemagalel.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rojazig.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/divuxiridenozujikitaloju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=bicep+stretches+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_off0000e4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 18248 bytes
SHA-256: 71743b560709968d10a958c2fa572859543cd826d78052918b77a1c67520cee9
font_01_sfnt_off0001146b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146B 10336 bytes
SHA-256: b4f800f1189e13abe61e382756b107bab94110f5bb6bea92254784d318511e67
font_02_sfnt_off00012be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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