Malicious PDF — malware analysis report

Static analysis result for SHA-256 269a72b7cf928aeb…

MALICIOUS

PDF

82.2 KB Created: 2021-09-22 19:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b3d31ae0109132ffd031ef18c7bc0ad9 SHA-1: 20a355da2f76377f6b5da5bf66df5694132c4725 SHA-256: 269a72b7cf928aeb878381317b31ea32433a7dcfb57fbe147778d33ee4ef3477
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to compromised or malicious web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://infrive.ru/uplcv?utm_term=how+to+screenshot+without+showing+on+snapchat PDF link annotation
    • https://thietkewebseo.com/webroot/img/files/zusolezipigenonup.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/50f9948efcc2cb452eed74ee3e5dedc0/tezolexa.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/7005484250.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/lalivere.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/5126556024.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/58617482772.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/61762482653.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/97398321942.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/49930238272.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/ripatadafovuxonu.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021090819000170554.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/fitid.pdfIn PDF document text
    • http://ashioke.com/images/library/File/toruzikamazamudutozusiwu.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/pebubikajukud.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146f804b405d---74611500966.pdfIn PDF document text
    • http://gewald.ru/content/Files/wilaxelo.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/ladibujuwirob.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/lorametavav.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/lubimulevudesowewixepuk.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/53949491994.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210904204706.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/90356414159.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_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 18192 bytes
SHA-256: 81980ca27432428e6db1520c89b1775aca9cbe60bec58dd537e3d5142cdf2a1e
font_01_sfnt_off00010a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 10784 bytes
SHA-256: 297c5b99838a347d81f909e889cc760f3713c6bdc747a975b0f9ecd92ad240b5

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