Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbee9adfd79cecf4…

MALICIOUS

PDF

82.8 KB Created: 2021-09-18 01:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b7a3ce9fa8bbaad97fca15e511e4cf7 SHA-1: fea805d6d6868bc1c4dd45c2f7b333d8e0473808 SHA-256: bbee9adfd79cecf4fa55cdda8aec2226441cc0632cffd89428cca091db7b5bc9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to PDF files hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://teewer.mn/ckfinder/userfiles/files/wezuguxekules.pdf In PDF document text
    • http://xageunion.com/userfiles/file/40191640695.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ded935de08---velunelugabaderana.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/17551447708.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/74610764052.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/78299142962.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/59ed67dc0b9055ccfea5ef09c336f334/20015485866.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/tetujabo.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/fekurema.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/22974080396.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/bulufuxebavusisewigi.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/52727785528.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/nasesixugupipavogibiz.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/dalutepu.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/nokitiw.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/e6d070dd1e79c01ffd96593a63e7b4eb/9607136336.pdfIn PDF document text
    • https://baglab.pl/galeria/file/66853959309.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/noferoviligawajadufiru.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/sezejilekagadorekatinej.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/62640003689.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/73346353171.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/fuliximozewas.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/848019409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=adding+widgets+to+androidPDF 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_off0000dfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC0 17528 bytes
SHA-256: 1b7fa0f0b1cff20d3e95e8d4ea33418cbdf6fb4ad2f9710ec64e951af8f4562a
font_01_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001258e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258E 10444 bytes
SHA-256: e0f074e0143f834e8538af8aba1cd8bfa0830e228b723ff16c6530ec85446b8a