Malicious PDF — malware analysis report

Static analysis result for SHA-256 e859456f1e1289c8…

MALICIOUS

PDF

130.9 KB Created: 2021-04-06 05:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c454bce84efa82228c5de4fbc856e22d SHA-1: b39358e9fe9375471f23df6071fc6fbd56a26243 SHA-256: e859456f1e1289c8cb1a88b64e687be357275d2de3e9dd27b07cb1fc6a908c50
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm heuristic, suggests an attempt to redirect users to malicious websites. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into clicking on a deceptive link, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=johnson+6hp+outboard+for+sale
    • https://cdn.sqhk.co/bodavadu/do1qqZ2/ifly_gps_720.pdf
    • https://cdn.sqhk.co/vewukiziwemi/Qge16ib/26474351593.pdf
    • https://cdn.sqhk.co/lewoxiguj/OwulifI/automaton_definition_thesaurus.pdf
    • https://cdn.sqhk.co/ruxuzobisu/gkgi5fP/screen_lock_time_password_mod_apk_download.pdf
    • https://cdn.sqhk.co/woleparos/hWqjHjb/best_english_to_urdu_dictionary_app_offline.pdf
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/wifujixunapuwol_vixidegitekak_gureve_fekilitezo.pdf
    • https://cdn.sqhk.co/fiduzosi/jaVhghj/free_download_private_browser_for_pc.pdf
    • https://defasoxajex.weebly.com/uploads/1/3/1/4/131405962/razatagedizumi.pdf
    • https://cdn.sqhk.co/pibepufas/jhUDsie/61425129962.pdf
    • https://cdn.sqhk.co/rojisixel/boPcihP/witch_pop_magic_magical_bubble_shooter_pixel_games.pdf
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/e0c5177796a407.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_96410914e2d64d229e0c3df6d8b9a03e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/581dcb19-0e9f-4aed-a539-7edd316c5160/craftsman_lt1000_riding_lawn_mower_deck_belt.pdf
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_6a77658395364dcf96681848b352669e.pdf?index=true
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_bb8bab8f38f04287affbbd5feb7bee69.pdf?index=true
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_931423a44d8a40849d9a382a4e62442a.pdf?index=true
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_7f666b6f04474688bca6edf820efb965.pdf?index=true
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_ca4c44a39c4f4718a4397d68f766c6ad.pdf?index=true
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_cac2289026bf4394ab7d2662a35b5245.pdf?index=true
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_eac9a3fcaa724503a57959e07ee44647.pdf?index=true
    • https://uploads.strikinglycdn.com/files/15e7f14c-1c5c-4774-8a91-489ff54187bd/.pdf
    • https://uploads.strikinglycdn.com/files/afb4800c-8d48-479f-afc2-a66a8f0f6de6/26524615101.pdf
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_7d813fc9b173416ebbc0365f0785f95e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/faf81a8b-a6f5-4228-a3a9-f656b56ca5a5/car_mechanics_book.pdf
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_652231445dbc4369b82582134108a945.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8184a9d4-8536-422e-a044-1dd623e15be0/7749901830.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_off0001c3fb.bin
8e7a6feb71ee212f9274691477126d2fdbc85077c325aa2328ef691c406f6628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3FB 5412 bytes
font_01_sfnt_off0001d64b.bin
cc0d5705c9de735f6cdba91797ed58f2193745fd22a0a54ddcce2231173e6e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D64B 11532 bytes

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