Malicious PDF — malware analysis report

Static analysis result for SHA-256 3735e75db6f62e55…

MALICIOUS

PDF

68.2 KB Created: 2021-04-02 10:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ab9e65d6b80ab05f548c1a8b95d488 SHA-1: 1f524859c4cdd4c5e82d72e0cc38ebf7754295d4 SHA-256: 3735e75db6f62e5583028e0acc12ac32419746b8abeec6771ad4f3be46754365
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to project management documents. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or to download a secondary payload.

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://xezojetit.ru/strik?utm_term=formulacion+y+evaluacion+de+proyectos+marcial+cordoba+pdf
    • http://apkweb.net/australian_wild_dog_extinctvfe1c.pdf
    • http://onlineeshop24.xyz/how_to_pair_jlab_earbuds_to_phoney5vpj.pdf
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5ff4a4737347d.pdf
    • https://cdn-cms.f-static.net/uploads/4462036/normal_6059647656b39.pdf
    • http://file-id.ru/teeter_ep-_960_manual5lb8i.pdf
    • http://myluckybet.xyz/gezako1tj84.pdf
    • http://supsun-aero.com/how_do_i_setup_my_canon_wireless_printersqeh8.pdf
    • http://zalavsky.ru/vesozoxevelegimeskoool.pdf
    • http://instapodarok365.site/tiger_scout_bookb2cr4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dubiditiginowo/topography_guided_lasik_vs_wavefront.pdf
    • https://uploads.strikinglycdn.com/files/5046e79c-3aed-4085-95f1-7a1c0fb467da/what_is_the_theme_of_the_short_story_the_chrysanthemums.pdf
    • https://uploads.strikinglycdn.com/files/7375e6b0-6a70-49b7-b47f-22ad2ff365f5/raxododatixutixuzobaxamag.pdf
    • https://s3.amazonaws.com/xafaxotaful/nemewetawinubegilebile.pdf
    • https://uploads.strikinglycdn.com/files/7d102c29-c965-41b6-be9e-b46d9cd25697/91331815137.pdf
    • https://uploads.strikinglycdn.com/files/bf1d3bc9-196c-4372-86b0-f28b24f559ad/55429038467.pdf
    • https://uploads.strikinglycdn.com/files/9e517a02-5986-4dce-8250-9bfea0b6059f/bissell_power_steamer_duo_pads_2078k.pdf
    • https://uploads.strikinglycdn.com/files/3816f4f6-f822-4ef7-8c88-b71c3fd9b401/titobisubuv.pdf
    • https://uploads.strikinglycdn.com/files/5a61e237-738e-4ee8-ad95-40cee9d538a6/zelilojadojezidi.pdf
    • https://uploads.strikinglycdn.com/files/753f6a00-9eb1-4e60-bbf9-04e3713efaf0/daniel_fast_vs_plant_based_diet.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_off0000c970.bin
4c41127275e0a3848545a3175d2d4acf23c9ae4ff53095681c54744c37c51ab6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC970 5560 bytes
font_01_sfnt_off0000dc49.bin
a8b9508d3a747b15d87cb81f931c6c59c9c89e9692aa47a73a8c367b549633f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 11200 bytes