Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b25da2c1c07775…

MALICIOUS

PDF

84.3 KB Created: 2021-03-19 19:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55249735847a8d1543a84833bc7337c1 SHA-1: 17a5e54832b9b6ed4c293d65f122201e490764e8 SHA-256: 78b25da2c1c07775b767fc803ae12934a6f68a3a5ae90e8c15773dcca9e591bc
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, forming a link farm, and one of the primary URLs is associated with a search query. ClamAV and ML classifiers have identified this PDF as malicious, specifically a phishing trojan. The presence of multiple external links suggests an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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=cuantos+kilos+es+un+metro+cubico+de+tierra
    • http://sokfresh.fun/apk_drone_view_official_mobile_legend9hche.pdf
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/sefakojulefuwibo.pdf
    • https://cdn.sqhk.co/rojarimeg/5PzhjLV/jaxomonumorolo.pdf
    • https://cdn.sqhk.co/pejibuti/FHhjZON/53790004852.pdf
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/4272485.pdf
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/3135760.pdf
    • http://minesaxofunawi.getenjoyment.net/56335061762.pdf
    • http://tufuwavaziga.mygamesonline.org/how_to_watch_little_fires_everywhere_show.pdf
    • http://weraka.online/eia_scoping_report_examplekomht.pdf
    • https://jerewetazawupej.weebly.com/uploads/1/3/4/3/134384555/nosurul.pdf
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/1d04a02a91a3.pdf
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/2636740.pdf
    • https://rosavipufek.weebly.com/uploads/1/3/5/3/135315232/vibejilitur.pdf
    • https://cdn.sqhk.co/vexavudakepa/hdCc53h/pocket_racing_drift_3d_cheat_codes.pdf
    • https://cdn.sqhk.co/purovufizu/350jhic/detonemowolisebatudade.pdf
    • https://nobasaxekomu.weebly.com/uploads/1/3/5/3/135322761/3ad820.pdf
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/gexivo.pdf
    • https://cdn.sqhk.co/putomikoluku/mtjajj4/win_x_launcher_pro_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/64761c33-b0bc-44b4-8d0f-dce9042d536f/wine_enthusiast_wine_fridge_manual.pdf
    • https://uploads.strikinglycdn.com/files/d1a1012f-14b3-4cc7-9c35-4fc12ad29377/68363144403.pdf
    • https://uploads.strikinglycdn.com/files/734feb7e-34c2-4d07-b843-fc739550cddb/20081201958.pdf
    • http://magegefopo.atwebpages.com/first_aid_step_1_2016.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11f.bin
a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 2900 bytes
font_01_sfnt_off0000fb61.bin
597c6629c9a709be1afa0c3f8555445eb082a5027e5a5fa42662c5248dacc563		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 5196 bytes
font_02_sfnt_off00010cf0.bin
a6fc47a76262a9c7c6fc659b7a5e1172adc358eeb413bc9059818165d1d133c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 12180 bytes
font_03_sfnt_off00013371.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13371 4324 bytes

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