Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45e37f54d83b61c…

MALICIOUS

PDF

87.7 KB Created: 2021-09-02 13:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1acfe896a915441cce7e9c13fd72e8b2 SHA-1: a9d2c9fa9699b69825680e49fc8c3eca33a998fc SHA-256: d45e37f54d83b61c6220027e0a40805ce5c9ad7ad8502a29e602d8cd2c856538
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs likely serve as lures to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=chacha+chaudhary+digest+pdf PDF link annotation
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c13e226e672---72874466921.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/e6ed95f4a8f7121c3c509f486ca24bf8/46573176608.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606e29802631c---46733566102.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/nosanep.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/mojikaxaponi.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/c00smgi399jpmpcshujbd5li4d/97272833210.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/werabax.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1q05k661l3iecokdepstqc43p2/93069031542.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16098a6a7ef30d---98555275358.pdfPDF link annotation
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/9dbmo1cf0s98arvcltugcfnr4e/4005578686.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/14931370666.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/a55o2fo1a6jju23tg66nu8sh7s/furij.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/43019469617.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca68ef0c9---witogof.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/zuzolubarapovorijuzodekex.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/fivitujepobofovubexuz.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ifm7is32mhcpkca1o0m3ftr37e/51909815763.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/90625008896.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/049465e024126ac3efb2001f6dab147f/45240088407.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/zodolepugilitijir.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/widonabuturuz.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119e097a254a---47572734670.pdfIn PDF document text
    • http://mlead.net/images/e/file/29796357245.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_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 18176 bytes
SHA-256: a29127cca1fdacdad1dd178cb51db9f71aca359bda1c5e334d7dffb65c8fbc6e
font_01_sfnt_off00012053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386A 10872 bytes
SHA-256: eb0e51b71037f2adad0a35519d4a84dc7e578f12d448be6f8947c24f58c9cfb9

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