Malicious PDF — malware analysis report

Static analysis result for SHA-256 36620674a2b333df…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 12:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fee2fb74b0ddce2f2614c196e2b6a5ce SHA-1: 01388beb46df1ab71720dcd06d892d657897af73 SHA-256: 36620674a2b333df106ee28fcd2101d5e771e5634de568fbe26592bdd75c6a85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple domains, some of which appear to be compromised WordPress sites or disposable hosting. The presence of 'utm_term=apk+download+file+manager' in one URL suggests a lure for downloading potentially malicious applications. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://lifesmart.ro/ckfinder/userfiles/files/tipagiligepewu.pdf In PDF document text
    • http://actinq.nl/upload/file/76279019517.pdfIn PDF document text
    • https://pisausakti.com/contents/files/11570749229.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403ba4aa601---lilumaloniguk.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/papofuzaxojaduxusiv.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/48611106398.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/670523082.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/92772243662.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16138a974adf6f---92716905783.pdfIn PDF document text
    • https://keongracun.org/contents/files/60512182399.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/jafemoxavekanutuvomomo.pdfIn PDF document text
    • http://getem.pl/files/file/zigir.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/lejemitetowutesib.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/davotivasifidafasuruka.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/53924379977.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/3564085890.pdfIn PDF document text
    • http://zamaro.cz/images/fcke_files/file/mexugewaregovawupe.pdfIn PDF document text
    • https://dm288.rs/slicice/file/15177853139.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/2459260905.pdfIn PDF document text
    • http://sbkf.org/files/files/53846828252.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613668fe4c0e9---luresanek.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/28300305104.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/82437125239.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/kamonisutovelalidas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=apk+download+file+managerPDF 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_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 10732 bytes
SHA-256: 5f43d08361d9125705a72ba488f974d812e663f73723cf289ace90b4c7eca1b7
font_01_sfnt_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 18584 bytes
SHA-256: 42f1f824ed1762ff3d66676242a5299b5242797c2982cc79604869daa9fe7ab8
font_02_sfnt_off00012874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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