Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec64ab2f67a9adb…

MALICIOUS

PDF

78.4 KB Created: 2021-09-03 01:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 40f9f8b74e319174c47ac5f59da0c866 SHA-1: 1f63ef60aa55a27d5c3db1ebfc04498db85eefd7 SHA-256: 2ec64ab2f67a9adbada307089f96345193dfa21d9a0a5161d977ad7fe641b637
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of a link farm and compromised CMS upload storage points towards an attempt to obscure the final malicious destination.

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 http://robbes.nl/media/files/68276504522.pdf In PDF document text
    • http://heorungminhphat.com/luutru/files/93374326990.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/rejikuved.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b897fa24517---vupoja.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/pixaxudo.pdfIn PDF document text
    • https://birotex.rs/images/files/83593478313.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/sodikupuxamob.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/wiwugikixe.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/nerumabu.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20216126196065.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7b6439b79ec8b7cfcdaf19ec42ba8d63/kevufatovokigewe.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/182965845860c1056026020.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/3161131044.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/lenusojirotedovinixuti.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/195d8236b8c4d72f59efe24ba8f9f939/21700414315.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/wuvuxufo.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1b0f87acc---nugapanufudanosafebiroz.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6e9f14c06---12684533240.pdfIn PDF document text
    • http://top-conversion.ru/ckfinder/userfiles/files/27363337326.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae893f8283b---17678402032.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/xorugatanim.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/70744778907.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/42185688908.pdfIn PDF document text
    • http://hrudolf.com/userfiles/3369376925.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=qx60+2019+manualPDF 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_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 17320 bytes
SHA-256: 059de4c6e9021b1015e68c8fb55ba699e7748a0ec6a60534eb3ef2c5032735f2
font_01_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 10452 bytes
SHA-256: 118c42b4a92ea14e26da00590d9c3b1a1951acbc1ff335145d7265b79b593383
font_02_sfnt_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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