Malicious PDF — malware analysis report

Static analysis result for SHA-256 e208511a0f036a5d…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 10:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d56eb7f7d5742c9bbdd0cf7edc22f64 SHA-1: ef14ed81cb19e3f1e44df18016d620c586a99a98 SHA-256: e208511a0f036a5dbe214f23e32dc54537366429f08a8c8dfe2972a534d11683
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=monster+high+beauty+shop+apk PDF link annotation
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e26723d0f---5846809933.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/putokozopopelubozuxir.pdfIn PDF document text
    • http://4yoga.by/pics/files/masulo.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/dirotosapisovomumirumuzi.pdfIn PDF document text
    • http://charivne.info/images/file/fudavetuliwizijis.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/71250721333.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/89683779296.pdfIn PDF document text
    • http://salwex.hu/file/xizabonetodof.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/262c052b74801b4de1188215a87cdf9e/tetaraninaf.pdfIn PDF document text
    • http://e-hematologica.com/users/file/zesufoxaxunuki.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/rudanewemubabevave.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/65850330143.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/joritibojawenulu.pdfIn PDF document text
    • http://babamoleskine.com/files/file/tusarefotufolikosefa.pdfIn PDF document text
    • http://ndt-ultratech.com/files/29702424982.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/bunij.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/896c6fd209e4579373b1d2c224ab84a7/24239970045.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138dd02b687d---9754430277.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/nitirivapetu.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/27669539988.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/kewefasifevesugo.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/19984274721.pdfIn PDF document text
    • https://denimder.org/resimler/files/mawuwel.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_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 10924 bytes
SHA-256: 605ce49c7cb12efdc7c6a5f1db5a4e3e9448df0f1947f66636a5be0b243dd355
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 19264 bytes
SHA-256: 0f37bf270b8e44b724a309038d6e7af8668b00854dfed752ee55ce98dcd2e741
font_02_sfnt_off000125f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1