Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f25518289376a33…

MALICIOUS

PDF

66.8 KB Created: 2021-03-16 00:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9489f6ebebd04378215690026a8eb6b0 SHA-1: a13aa0fb155898c98f584888c2971fa0c5564843 SHA-256: 7f25518289376a33feb5962d02c96070ea40395838cbab0fb091192dbc889360
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely used for phishing or to serve a second-stage payload. The PDF structure itself does not contain executable scripts, but the presence of the malicious URI strongly suggests an intent to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=angel+with+arquebus+apah
    • https://cdn.sqhk.co/bidekidarub/dVjhjiz/galaxia_la_picosa_emisora_de_guatemala.pdf
    • https://cdn.sqhk.co/dijowasedop/Gkhehho/idle_heroes_e5_tier_list.pdf
    • http://vodonepivek.22web.org/87222016578.pdf
    • http://vogeposekuxav.66ghz.com/94422538264.pdf
    • https://cdn.sqhk.co/zejizoguzut/Wid24hd/snow_drift_quartz_countertop.pdf
    • https://cdn-cms.f-static.net/uploads/4459929/normal_60325775f334c.pdf
    • https://cdn.sqhk.co/gudopokobipa/jGjdWie/cnc_wood_projects_that_make_money.pdf
    • https://cdn.sqhk.co/pevejotomoma/eBhgigF/kagefefifitobozezetojonu.pdf
    • https://static.s123-cdn-static.com/uploads/4368479/normal_5ff2796f4db51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/577c0e07-2624-4ac2-9092-005e1f2965f0/red_storm_rising_summary.pdf
    • https://s3.amazonaws.com/bitajemisajoz/gb_whatsapp_new_version_2019_apk.pdf
    • https://s3.amazonaws.com/lovetijif/android_studio_change_minimum_sdk_version.pdf
    • https://uploads.strikinglycdn.com/files/2a48384f-a9e1-4e20-8e03-37d9775a720c/sixavabukususiwenerevo.pdf
    • http://ketejaz.epizy.com/programa_de_robotica_para_nios.pdf
    • https://s3.amazonaws.com/sazixipame/talemiwakukiwig.pdf
    • https://uploads.strikinglycdn.com/files/7ac6f0aa-72f2-4073-b8e7-4b52c143b84f/92242205547.pdf
    • http://tebokemirutexus.rf.gd/poropegalimasugano.pdf
    • https://s3.amazonaws.com/busutafitufe/house_rental_agreement_template_south_africa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c0.bin
ebf7fa823539cfe6b314205fbbab5d312196abd6b88dfb0cc81a9971efcf17a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C0 5428 bytes
font_01_sfnt_off0000db41.bin
45ecaa40f3bad71702bc6de76901a4afb5a5eb7398242ff2543c31b2c786d0e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB41 10080 bytes