Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb61fff69c95785…

MALICIOUS

PDF

85.6 KB Created: 2021-09-13 20:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f888b833f8feae9bc30b17f0854bb09 SHA-1: a86e7074b6174a59b7e3a254b1c5c46fe03236f0 SHA-256: afb61fff69c95785e1c8885966ca661cf9b3fdd3c1cda103173d64113ccff6d3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and link farm heuristics, indicating an attempt to redirect users to download files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://adaviestransportltd.com/userfiles/file/24325525690.pdf In PDF document text
    • http://sotel-perm.ru/site/file/zedibag.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/90305570325.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/76144988298.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/50626646255.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/34466535527.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210903043730.pdfIn PDF document text
    • https://kar360.com/resimler/files/39917977556.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/161319ea85a56f---38121557163.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/welaze.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/nuxowesureferukoweleti.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0288aee28---14696939970.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16137371394030---13155740248.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/13030034924.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/dafepijiwagixame.pdfIn PDF document text
    • http://sdes.in/uploads/19117386223.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/88757292295.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/fakuwilugoputeso.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/namitexudase.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/dajifevoviga.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/f7f8335056faf97094c73bf056331f6c/wikapepeb.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/dufive.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909115453.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/toxogejuku.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/44629593583.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/a41c3f7836f6335ccd7d1a73a00b878a/lusirufop.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/gobividigununonazoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=command+and+conquer+red+alert+apk+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA78 10976 bytes
SHA-256: a2b0598216fba51e197ca3af94ccd8432d86888cf37d5c207f642cc7886bebf1
font_01_sfnt_off0000e3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CD 16360 bytes
SHA-256: 84657a3efcf4a0ab380e0b6fa06397548231176f28a193c530d867b23635eb41
font_02_sfnt_off0000fa44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 20948 bytes
SHA-256: e06960ea78b8e68c9c5d491b81dde2429cb7aaca93447cce638f581575d73cba