Malicious PDF — malware analysis report

Static analysis result for SHA-256 9864eaca0b5a59e4…

MALICIOUS

PDF

83.4 KB Created: 2021-08-03 12:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11641df4d9e4bd0e32f0b3e0a366c0e2 SHA-1: 1e3073dcfe326e2b0fc033abe73b8282b42c0bfd SHA-256: 9864eaca0b5a59e4dffc7f0a5913d7d844ecc8cb9331cdc3cdfa9e5dba665786
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains numerous external links, many of which point to compromised WordPress upload directories. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading a payload. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=fisher+and+paykel+2+drawer+dishwasher+manual PDF link annotation
    • https://szabobuszrendeles.hu/files/files/zaladapidaganujun.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/uk5fbjtmb3o5lc0e4f1dn63pd0/fibenewilejulur.pdfIn PDF document text
    • https://mimpidia.com/contents//files/gezatorugevubigo.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/melunowibutut.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/0b567475e6b3cea74b6ec2a6cd3d895d/lomepivozakoxoseligavete.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/zujiv.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/07422d7c73cbbb9a7a9908204c2908a9/70314821758.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c051c001---zimalemeretusipubare.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/aa25d485b10247ba86d7dc4808521e6f/51206448916.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a1778a63b274fcdf1ac6ca7a1ac41821/lasemijudutidujonidipopel.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef5ab809c3---82578197122.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fea4221b6---3028231590.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160995778ee7fc---zitividipalorixig.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/9424140675.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/77153098521.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/49savaucebs4p6vk3eb2cghmdm/biwox.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/jixitidejozakexuvewobi.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/gabuwasagom.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/divexudixugo.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/filurutiwomuzebubigemujof.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/1862012553.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/41124044278.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/kivofipinimivu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/9686da71f85b0e505dbc3eb538475400/sifabubexovasew.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/57790055275.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 10928 bytes
SHA-256: b2759112f7aa4446d3ea2b7b691a07ef64735c3c10601a49e17c554555e4d2d2
font_02_sfnt_off00010e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8A 18000 bytes
SHA-256: 1f2c9375f6c8527c69c31a640a4242da548396621161da38414cff5633e66843

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