Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbe5e1ab773acb9…

MALICIOUS

PDF

69.1 KB Created: 2021-09-19 04:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9f45814e84abfda5298924930c0fa33c SHA-1: a75701a5a706572185643d3e5fbf14c5a193e8f6 SHA-256: ebbe5e1ab773acb948c922882898565bd441461fe784b5f36c12c0e25b4b8fc9
146 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URIs, many of which point to external websites or IP addresses, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a link farm designed for deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=how+to+get+all+the+fortnite+skins+for+free PDF link annotation
    • http://fanghsin.com/uploads/files/202109121634233497.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i9gifs2g3nk010ag1aspem3g9p/43463327684.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/10733808428.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/mitapijoperovod.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/4314149203.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/23483386671.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/jowaketovira.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/tufizaremigutipazire.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/jadoxozisom.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/wudunoraxugurupikox.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/ninoleramukumumoju.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/pasewusilabajemikijomezu.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/9138384618.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87f648b16ef0a1b60d35cc631d25713d/40554681238.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/89136588731.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/jizekikotopuwepaborixa.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/gekalukuxavero.pdfIn PDF document text
    • http://starma.pl/files/file/rupebola.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/47464739456.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/58088781378.pdfPDF link annotation
    • https://bedandbreakfastholten.nl/userfiles/file/149377847.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/tixudot.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_off0000b060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB060 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC872 15332 bytes
SHA-256: c297f9a0d5b16d685c85507ee0a0a9cd87dccf9a3a5e9110fc43c171128b57c4
font_02_sfnt_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 10660 bytes
SHA-256: b8cd4a214bbaf637cc584cdad12d6c66096438819f3b8df58df115ceb558e6d4