Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4f1e926423f3b4…

MALICIOUS

PDF

79.2 KB Created: 2021-03-06 09:42:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0528b2cbaf42ec716a3a0db551f885a7 SHA-1: d8a15e63a3c92143a8adb2506fdb0d3b6bc3e5e9 SHA-256: ea4f1e926423f3b4688389d010f9fe3cee8e619e798ffef87aa13f088b1c56ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are disguised as legitimate content, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=rogue+season+3+episode+guide
    • https://cdn.sqhk.co/limexofure/jbLha27/healthy_nutrition_tips.pdf
    • https://cdn.sqhk.co/puxolika/hiigihc/neon_motocross_games.pdf
    • https://cdn.sqhk.co/tezakagadol/Ngdjeb3/77523046651.pdf
    • http://jojidasusesot.sportsontheweb.net/speed_learning_cartomancy_fortune_telling_with_playing_cards.pdf
    • https://cdn.sqhk.co/xedaberetaj/giKPivu/90772056057.pdf
    • https://cdn.sqhk.co/zixedagiro/8ibhjgh/clean_road_game_download.pdf
    • http://sibogufurab.medianewsonline.com/59138509880.pdf
    • http://toxipoxekej.medianewsonline.com/xudanikonivik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dejolavubukugeb/faster_app_landing_page_html_template.pdf
    • http://tavoxelelenasi.onlinewebshop.net/chopin_prelude_24_difficulty.pdf
    • https://uploads.strikinglycdn.com/files/47183cbe-ba37-4923-afc3-c9c1fb38a7d7/42582144350.pdf
    • https://s3.amazonaws.com/lanorolowu/abdellah_hammoudi.pdf
    • http://tebuwawezizafes.onlinewebshop.net/how_to_mix_aveda_color.pdf
    • https://uploads.strikinglycdn.com/files/f7b0f8c1-f3fc-4a4e-925e-9dba369bfcf5/fabizopozikunenopuj.pdf
    • https://s3.amazonaws.com/vuxirefare/74159967365.pdf
    • https://s3.amazonaws.com/lepefi/71797379277.pdf
    • https://uploads.strikinglycdn.com/files/2a7af795-f919-4920-b29b-111cb24e5aa6/ophthalmology_abbreviations_ou.pdf
    • https://uploads.strikinglycdn.com/files/45ce8035-3231-44ca-95af-8395e1fe69ad/tilevojinozebu.pdf
    • https://uploads.strikinglycdn.com/files/b7fd253e-b16d-485e-859e-89104533178f/46501189072.pdf
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_0ad74095f4dc46c0bb1d98bcdbbd8bd5.pdf?index=true
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_7b1ef76bc8a445cdae84eca935279783.pdf?index=true
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_2a82246cb3f44a079a223d5d866576e5.pdf?index=true
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_8694481860fd4808bc489e8b1ab27398.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d0faff1f-9dcf-4f4e-84a5-ef0d6adb0d17/6231121106.pdf
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_bd91c7303e374d42a3d82409a71feb74.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_off0000f8bb.bin
85c5a5b3de3f641449a976da6613b01298bdcae1cb459b7a700f575d60ea3b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 5172 bytes
font_01_sfnt_off00010a6f.bin
9ebc653c4d1657690a58e88f4824e292aa0e3e0395d18edc2e2844a61fe3f5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6F 10720 bytes

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