Malicious PDF — malware analysis report

Static analysis result for SHA-256 9374bfa64bd7d111…

MALICIOUS

PDF

111.2 KB Created: 2021-08-01 21:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34ae1f44803061f39bf22fbcbc5385a0 SHA-1: b0e869fdbf7888667fa6171ef7cf7fa8592973aa SHA-256: 9374bfa64bd7d1118a35f700a4fa176d95df0b34f246978205b5179e7306c5bb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The primary attack pattern involves luring users through deceptive links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9465

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://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ddd9d7f3336d351d64f2edc3606e8715/wafiduborapepafixafuzara.pdf In PDF document text
    • http://nlureunion.com/clients/33063/File/73219264886.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/63019644363.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c291fbaa7d4---zenaxogotukasiriv.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/3btn1mhja2bo6uh2o92gf44ug4/rutazosudoxerur.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/12731550566.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1684c8596f---vekevejewujewe.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798e6aa8084---88036863058.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bc19f773d44---4687999854.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdb99e740---sawowinawusulajumubojimij.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/17361604508.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/bbeb5fb016289af3600509e58c890773/34148396215.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edcdbba302---betosiv.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/depedenujeba.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0e0c1e4ef02d5e9d0603f04cda396ba9/76698466830.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/loxakov.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/jr0tjdo3qj5893c0mn9c8lvf4k/wubatam.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/tonopomemugetuvopemabod.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/f44b60babe88de41cc8769bf1c6cc4a9/bekurewe.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/3daec3c1b6d2511dc3a747dd9bf3bbfd/ranelipes.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/ridovamafut.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d11f8c553---zadad.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/loxofumuzogizanuwesiga.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/92956012362.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c97a585e2ad---50730201017.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/gupomasawebibafinevibuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=resume+builder+app+free+cvPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00012d86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12D86 17872 bytes
SHA-256: c9fed82a1cf617e927f15c546874b122e7df46d5c177e637097ee6cf1d558b63
font_00_sfnt_off000114d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D0 10808 bytes
SHA-256: 0d655996bdc8e59c85a1014e9d984c484c181473ad7fe46d9dd57f70957c4cab
font_02_sfnt_off0001498c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498C 2636 bytes
SHA-256: f807081362ff27b82e708baaaeac8247b52c42701324225993fc6050f1deb2c7
font_03_sfnt_off000154a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A1 24776 bytes
SHA-256: cc4cb70d0bab3d5ee237981a1829cf40e01c2646efdd4c8d687f6a4d318f7814
font_04_sfnt_off000192f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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