Malicious PDF — malware analysis report

Static analysis result for SHA-256 65daec8feae0f7bf…

MALICIOUS

PDF

72.6 KB Created: 2021-09-28 12:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a615adbc720520c2ab10846985e416a SHA-1: 5544ea113cf120e46134d07cc9ad2e90b2c7ff89 SHA-256: 65daec8feae0f7bfadd0164eec9f96f1ccf7297c48e57964946f2f0b6b28619e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the PDF structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c991341eeab986464381dd3b06338970/14079230602.pdf In PDF document text
    • http://serenetour.com/image/upload/File/miruzoladexibabosef.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143a5cc61dfe---nezewigurebodisabojenada.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/pelofi.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe338297a4---45552759330.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/28e6d6ec7f57d7128527d52892efde6e/32282950490.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/4332974189.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/wosut.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/danuxuboto.pdfIn PDF document text
    • https://dalba.net/other_files/File/gisefibalazobinufupaxo.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/fibenejodifomepoloj.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/87764976204.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/pidasiborag.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/88532237640.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/nubadax.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/dexenamorizebisib.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/nolumoxugavez.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/fezebep.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/99804265414.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/cchn78k1i35s5mrlmrli082bik/jebilonez.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/76379988795.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/83097255104.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/wewuvazamisunilaso.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/tiwasozekuxot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=free+vpn+to+play+gamesPDF 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_off0000b640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE52 17948 bytes
SHA-256: b5c1c32b880ed5f40be5ffd4a339febd84405a78880fd4d734d718ff0cae147c
font_02_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 10660 bytes
SHA-256: 1ad95b2ddf4420514f3855c9aa0dff311b10c794138803e709818bbe996d2eac

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