Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e16a1c568cb2e38…

MALICIOUS

PDF

75.7 KB Created: 2021-09-26 20:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7da555e74861e73dd1a628ae1176a686 SHA-1: aa0201ba92a305ba31eef70143f7a0c9dfc73a11 SHA-256: 0e16a1c568cb2e38f66f1d8fa13ad1ad0276c29b7a72222bbbd91d6d23ec150c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://pistant.ru/uplcv?utm_term=anime+live+wallpapers+apk PDF link annotation
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ri7uaclmjq4pgm2o92d6j84b0i/bepokopatuwerelul.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a8b689f629a13a923d4034bfbcb42141/lamobukorus.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/72233884225.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/43242301968.pdfIn PDF document text
    • http://nemochem.cn/upload/files/dimetobazowejalid.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/70513095613.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409bc55895d---12758869702.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/jilowire.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/6845086402.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/tisudixaxiviweli.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/jawofaxulavosuberufar.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/bamexenomuzemoseg.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fipujarizoxavuguxudanemal.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/31438540785.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149df13b2590---88550498842.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/sekumo.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/xazoluzuk.pdfIn PDF document text
    • http://rts-3.ru/upload/files/36915873337.pdfIn PDF document text
    • http://conkheror.com/ckfinder/userfiles/files/42572344281.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/mubibanifo.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16149891eb06eb---vovesavoduzuzudenigazesug.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_off0000bdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEF 19240 bytes
SHA-256: 9c62f758e15efc5bb6c0551595551ef68cbbbc32f1056f18eaee6799e6cc19c3
font_01_sfnt_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 10420 bytes
SHA-256: 79e337b023008f1f596ebd6e9936fdd4bf597f99096f9e039dd0ba6458ec2e98