Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b01c2dce0c13bbe…

MALICIOUS

PDF

75.4 KB Created: 2021-09-17 10:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1289b27829f31ff2edf4b2733ec42156 SHA-1: d9e248348b579e9aa693697baec1be4914a89bf2 SHA-256: 2b01c2dce0c13bbe4c4328415857eb992cb4dd3cc58a75125f4681e020ff3dc1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics further supports the malicious intent of directing users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=tr%C3%ADada+2016+watch+online PDF link annotation
    • https://fallsplat.se/bildbank/file/jijebuzisadodiloxejabanok.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/72585151897.pdfIn PDF document text
    • https://tele-video.ru/upload/files/japulov.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/dopilusejaziwazilokitel.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030624381930.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/bazubetubolul.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/14876064051.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/mapegufomumoxoro.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/popojojawimutu.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/fitolowemuluxekuninase.pdfIn PDF document text
    • http://denge.aero/upload/files/kojosefuro.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/woresuzuvamijorixefe.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/4282940188.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/34758204649.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/bonusitafimifafodafelorip.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161345b0a48374---26380112622.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d1423c499---bedusito.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/17850205604.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210917150223.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/guxubogakobutofij.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c656e9b9dc1586a11564a6b5de9786ad/19570066577.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/9a8ja74cdi9mibpt2rs19pkei7/xalevixafuzaxuse.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/rusivowubisixa.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/8538474632.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/64453590580.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 18600 bytes
SHA-256: d35e1031aeec211842b0052cd79ea6412d0a1e383511a920d4ac87772f71725f
font_01_sfnt_off000115a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1