Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee590b5f8619d01…

MALICIOUS

PDF

86.1 KB Created: 2021-07-21 10:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c5c6465ecd637fba9f932be9ce7d0a09 SHA-1: 97c436e6d90ff509f6084e93a20d89e7ab1d65ba SHA-256: 0ee590b5f8619d011c530c95dd37ef30450c34cbd80abdd02ddd1cb848d36c58
156 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior, suggesting the document's purpose is to drive traffic to potentially malicious or deceptive sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://amrapalispot.com/userfiles/file/88200042153.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d022cfcd---60370033111.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/47b61a6ca5e65beebd4e7a4b93cf79a8/24898451721.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/00df95c912d1ae07a8e1f73b77e11674/58174454780.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/14569483349.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/xefepazabemalufe.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc496ca6a5f---bagiv.pdfIn PDF document text
    • http://fabtur.ru/upload/files/70044149133.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/52a4289fc4f19bbd1dbcae113878e7e3/mevukamasesapasusutuwov.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7adc12a660---72473430183.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d32e26d252---vimadubikaje.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/923766740.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a925201f27e---2012330315.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b61351f2025bd781b696f53b725be4a5/taxage.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/lenovedosotanuripa.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/jimuvakekuruwepusogokuzip.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/91199929264.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/1ik817sqaos7ca8e03gu55n497/gujofadotuzezoxasasuz.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/fikitigubepodasizekizeno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=regional+meaning+in+tamilPDF 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_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 10228 bytes
SHA-256: bfbb443600571828ace3edc751a7a0a938e76170fcafae74de4c87ec520bea9a
font_01_sfnt_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA9 17968 bytes
SHA-256: f508bfd437da3c905f6a2837b101c290963bdc822faecf2493593bc1d1134dfd

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