Malicious PDF — malware analysis report

Static analysis result for SHA-256 d292d9d7483bcfba…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 12:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7197f4f3c09433ffb24dd78c53dbbac0 SHA-1: a350a5a4dfe2bc481e445ac9103411e2fc17c0da SHA-256: d292d9d7483bcfba46c2d52cc36eb157063daf2442cc5e460242f0e994e223ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The embedded URLs, such as 'https://resalured.ru/strik?utm_term=all+my+sons+kate+keller+character', suggest a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=all+my+sons+kate+keller+character PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368971/normal_600ad6cc27e1c.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/3fHKpck/gesazutumiporelekuruta.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/bLahbhc/cheap_living_room_furniture_sets_under_200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd61a0992b1d.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/jcNFhE2/assistive_touch_apk_android_2._3.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/l9Ciigd/mobile_legends_kit_dream_league_soccer_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/tevenijubuso/eGDjiia/pottery_wheel_throwing_class_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_5fe78405c25a8.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/RNigvhe/find_my_phone_by_number_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/gfXGOsF/fevabefo.pdfIn PDF document text
    • https://polemezal.weebly.com/uploads/1/3/1/4/131452876/daab04.pdfIn PDF document text
    • https://cdn.sqhk.co/rebiguta/gceEgcG/bream_fishing_lures_best.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zikeko/34717471832.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/adobe_photoshop_cs2_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/scarecrow_hat_templates.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 5192 bytes
SHA-256: 8422e7f2565ad363eb40ce7eb93e3732a0b38f19f97ef2855ccf6c4c7c688e93
font_01_sfnt_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 10284 bytes
SHA-256: 9f782ddf29ef385135174d190e5fdda85904a887360762446b4290923204c442

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