Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc954397d436c42…

MALICIOUS

PDF

69.7 KB Created: 2021-09-20 07:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6210d6e5ce858ed945ae3f9165ac0a02 SHA-1: d6b489e7edd281117bd713a21cd21299357f0a1c SHA-256: fcc954397d436c42157fdcf3aea893016f11251644a9ba5ab8010befb02e6394
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links, indicating a tactic to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=short+vowel+i PDF link annotation
    • http://lachina.cn/upload/file/63213264925.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/10361315204.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345f8d3fb76---99570966202.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/33945358646.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/jejuk.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210903215235_kmhig4.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/rufugepuf.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/48025520766.pdfIn PDF document text
    • http://ipublicity.cz/data/file/runuxowax.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/duwotox.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/vinedepapoxaribukopinatan.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/pomemugumedujo.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/53256433409.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/xezilowanoxavorem.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/kirekowuz.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/kizoxujupagopeburenino.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/miwofe.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f90b3a590---7834813039.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/52665860817.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/204078dcc0248d4db1b6a94d8a60aa25/22266768509.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/9558329138.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/49728980569.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/31286812161.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/eci66qico3unnvt3q8g6q1ln8l/sotoli.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_off0000b470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC82 15444 bytes
SHA-256: 8965091f0ba518b4289bf60d6e8a861f039a90a886534b3761e897e7b535e65b
font_02_sfnt_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 10000 bytes
SHA-256: bcbd3a69a03aad7406a8db41a375de576aafdf51db111798a550cf4ad249dd73

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