Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25fe4f2c26a3c74…

MALICIOUS

PDF

71.1 KB Created: 2021-09-27 06:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e01577bd058b6ad12d50cf684c81d238 SHA-1: 09fa9ec5a7d587422a8a5314e6d8ebe11c4a1e90 SHA-256: e25fe4f2c26a3c749f18ab15c46ab7397a580980570714e1b34d792ef60e8943
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is flagged as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing analysis of specific content, but the presence of many links points to an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://philabc.ru/uplcv?utm_term=best+game+for+android+apk PDF link annotation
    • http://www.schule.havonix.com/ckfinder/userfiles/files/23950065467.pdfIn PDF document text
    • http://clingac.com/d/files/pevowagizifodabases.pdfIn PDF document text
    • http://erpos.sk/data/files/zakutovuwep.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/40844651386.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/bixekotirifafin.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/gawaxumexevuketalatate.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/42338716236.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/gupagem.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/gubowoguxuzipejobokeseren.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b35c4b562---15671074438.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/88572040462.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/woxupojokadukupelemazo.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/64675975448.pdfIn PDF document text
    • http://sudeoksa.org/userfiles/file/20210907183552.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/75967522284.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210903_7824f.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/jejejoxofafudexinokuv.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/94168959480.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/82576096100.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/31656892919.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/givarajakeru.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/zirover.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613058fbe3019---zepub.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_off0000b072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC889 10940 bytes
SHA-256: 340f1d05dca6da606618fd94acee58a07982022443304b01979e846c6e893bd6
font_02_sfnt_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 17760 bytes
SHA-256: b3191fa1d2aeec5d192f930b040a1030d65b9b52d7467c12b4ea8e0c47946a31