Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6ad69b939a1f34…

MALICIOUS

PDF

72.4 KB Created: 2021-05-14 07:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06e658bc9f55ac9462931d0103ef76e3 SHA-1: d065643750d17d2cea28e2625530be9132479e51 SHA-256: 8e6ad69b939a1f34b3369be11409dd68c0915a431c9246cae0e0a559f68b4ab2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to 'maypoin.ru/strik'. This URL, combined with the heuristic 'PDF_SEO_LINK_FARM' indicating a large number of external links, suggests a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure. The ClamAV detection and ML classifier further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=last+of+the+mohicans+soundtrack+amazon
    • https://cdn.sqhk.co/labojime/cjbhcA3/bacterial_infection_blood_in_stool_baby.pdf
    • https://cdn.sqhk.co/mofekuma/T0hcOXx/talking_babsy_baby_xmas_games.pdf
    • https://cdn.sqhk.co/perigupa/ija0hiS/aurangabad_tourist_places_guide_in_marathi.pdf
    • http://rilomenininun.getenjoyment.net/how_much_is_a_slight_calorie_deficit.pdf
    • https://cdn.sqhk.co/xakurusuk/hgjhdhh/nokia_snake_xenzia_game_cheat_code.pdf
    • https://cdn.sqhk.co/biloriput/ij0jiHb/9225107195.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wizuluworafid/platicas_de_bautizo_en_guadalajara.pdf
    • https://uploads.strikinglycdn.com/files/69051713-b168-485d-90b6-27cdb3393f2a/what_does_it_mean_to_follow_instructions.pdf
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_93099b525b1d44c48fc14768817c49a1.pdf?index=true
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_ffd440b0e58b4e0c830a72653cd884cc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/271739ca-e20d-49c7-a504-697a73bd850c/digaxe.pdf
    • https://s3.amazonaws.com/zobuwubedak/limigegefunuwanutolab.pdf
    • http://dakafatuvuguviz.atwebpages.com/nonequilibrium_hypersonic_aerothermodynamics.pdf
    • https://s3.amazonaws.com/jevopemosod/meenakshi_amman_hd_photo.pdf
    • https://s3.amazonaws.com/mejobu/zawujamemozigifumetunof.pdf
    • https://s3.amazonaws.com/sefepugolupalax/husky_1550_pressure_washer_wand.pdf
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_dfb6a6b09dd84cfcbce693c872653d5a.pdf?index=true
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_73d129ff1d90452ba784f8725f0d7857.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_001bf290d87d436a9e3490d8846083e3.pdf?index=true
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_54f9aeee56184a79a6b83612ebcc93c7.pdf?index=true
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_1d15171457004176bae2368af6815fd2.pdf?index=true
    • 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_off0000d84e.bin
d8fbf5554513e1c82d500f10f4303f36d163f76482888b1b28a8705f8c52af68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD84E 5284 bytes
font_01_sfnt_off0000ea27.bin
1c17e76943bb1ce09a4414b4f53dc680fcecd8ec7fc00a61e240babcdb852f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 13372 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.