Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5836df4bb5b26cb…

MALICIOUS

PDF

71.3 KB Created: 2021-09-13 16:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e89f964c2599cf112455e6ae96a176ac SHA-1: ead2dae0285f440d457c3e85ff617a9b5de29b78 SHA-256: e5836df4bb5b26cbef131c1ee48a137767c3a1cc2d101308a6696484dd012e66
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://lyubomiradineva.com/files/file/tulaxakeluwazasetapupa.pdf In PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/dilikozafo.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/71331377924.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/89578987221.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/bipelonep.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/sedamuwovikikaxonoved.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/a17e1b44b6ca826ac2f43ff807ea4387/28336567379.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350a4872e71---65015150243.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/gojusefurovigolo.pdfIn PDF document text
    • http://sbairs.com/datas/files/4108443219.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138bbad47010---nuletuvaxosusibi.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/663befdd574d7ac1ebb8919f7643f797/76787959178.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613415043176c---mivikodafesu.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/ruvafokedakoregaluwiteno.pdfIn PDF document text
    • https://ayurmitra.com/files/file/19289273970.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/bolejiwokerizapupid.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/tvqtmbviffkecurji4sr32hi1o/pebodiguf.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/moginuxawubosavifan.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/34960958905.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/rilolebepebapabiribegojim.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/jukaji.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/10159020302.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/5abs4v8acbms8g7rejvlfr6dgv/jozav.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/97598354210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=two+players+games+unblockedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C1 14976 bytes
SHA-256: 9deca7700efc71640018e6994e82198d1a72f761e12d074e3fdfa21d5559f621
font_01_sfnt_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 11164 bytes
SHA-256: 4a2761298f003ca66272dd376f7fa5797f3117fe9ce03be3565c44650b058f4a

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