Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e09865df42c5a8f…

MALICIOUS

PDF

69.9 KB Created: 2021-09-27 09:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 23d2bf3fa070f7106eceb0d982018674 SHA-1: ca030374e1f9f8138f8a82c33f8aa78e23c91efc SHA-256: 7e09865df42c5a8f2dff3f1b62aeea6d506dc7de0272dac270b1e072e0069866
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing or tech-support scam. The PDF contains numerous embedded URLs, many of which point to potentially malicious or unknown domains, suggesting an attempt to redirect the user to a compromised site or phishing page. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/44056811298.pdf In PDF document text
    • https://likeevent.it/writable/public/userfiles/file/jirejesowodege.pdfIn PDF document text
    • https://ancoraeducacion.com/images/mobub.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/52694074487.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/mobawudazodel.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/58185656301.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/19418189272.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/piniluletudugifesagijon.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/xabafimom.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/21936977971.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138537ecab55---85993058072.pdfIn PDF document text
    • https://jjpremiers.com/files/90797083119.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/90856796424.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/16538424612.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/58739743942.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/seriga.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/94357538527.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/59890686316.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/42978934735.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/lezuwepogonudafepimuneb.pdfIn PDF document text
    • http://pasted-radio.de/web/files/50875727075.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/latinejezapotepela.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/72045637951.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/dadikaradonaduvigisevoj.pdfIn PDF document text
    • http://abbeloosschinkels.be/userfiles/file/67249436800.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/61231812269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=smart+messages+for+sms+mms+and+rcsPDF 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_off0000b188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB188 15692 bytes
SHA-256: 214b5dabfb148a7f14b130302d938579d991545efda588f6d9a098823545f496
font_01_sfnt_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF174 10756 bytes
SHA-256: 09721607c3309a5bf19b27db4d450148f7b5632d79d3b4c7b820aeccce384a51