Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd00513736c78d54…

MALICIOUS

PDF

95.9 KB Created: 2021-07-14 10:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4ea6d64a3e19a6cf87a972fe18e5ac03 SHA-1: 81ee3bf03d1369683ff240bfdee7e57392a522dd SHA-256: fd00513736c78d54a1182246bace9f15fc89f2932ce571017f7f6fa21e4eb634
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.aqsclimited.com/EditorImages/file/56725453384.pdf In PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/fajezatodab.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/97612858164.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075fae55edb4---68440370241.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/82090166682.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e65e4535ef0---88208506155.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/92351610779.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/o45nhagdbp4sm4n8h0r5st4evt/68055754027.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/moxamujazek.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/30208881880.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/45655860041.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d522748c50---kunukarated.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/c087aaeb2244197feb70ac3ee5a0b0cd/528417049.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160abdc3066723---61683050233.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/ba215190b3a25649c1ec11298422809c/fugekijilixu.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45576fdfd---6280796758.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/9gh8m5jr7l2kr9jerq222jto43/mapanusizuxibutunutu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/81723027009.pdfIn PDF document text
    • http://alkanboya.com/files/file///zekadimutasazivazafurufi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cad08b4a9db---27051930223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+paradoxical+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000157b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x157B0 16852 bytes
SHA-256: e1dbcc6821a6021c1af93509c121e6e7da4a0e02f0e1daff04b6ce7c30de37e8
font_00_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 10896 bytes
SHA-256: 7b8d7e5691d0fb8ecff8b79357f09d721cae6e90eb2f8f3fb5748cd0fb9f6a84
font_01_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 2752 bytes
SHA-256: d17e951b17dbdf2838c56c8921f42e9797fce19d35f58459b7acbbfa76925f68
font_02_sfnt_off000106ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BA 22032 bytes
SHA-256: fae36d88f1343cebbc8e85d0b29b66e7f984f7c8b66b2e7ad3b3f99df57e2508
font_03_sfnt_off00013f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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