Malicious PDF — malware analysis report

Static analysis result for SHA-256 3825a5a812a22977…

MALICIOUS

PDF

88.2 KB Created: 2021-03-27 18:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a192bf90b32ba1f36898ebbc3a8ffae SHA-1: 58f8c2fe1cad6d53a582fed2c09d8029b26222aa SHA-256: 3825a5a812a229770b0b8f7fee4edfa8b471781e4d7e1c6d4e739b5525a8712b
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, suggesting a link farm or a mechanism to distribute further malicious content. The presence of a 'download button' heuristic indicates a social engineering lure to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=cardioversion+pdf+aha
    • http://rivimebowov.22web.org/jaxowowenugoxodidufok.pdf
    • https://cdn.sqhk.co/feguzuvubut/hhjgchd/colors_for_instagram_profile_picture.pdf
    • https://cdn.sqhk.co/zakolemafemo/jen57DG/57553041548.pdf
    • https://cdn.sqhk.co/todiwapubu/f9Hjdgg/sedafuxixu.pdf
    • https://cdn.sqhk.co/kuzosexiwugu/jjhhehb/deluvuzogotutinava.pdf
    • https://cdn.sqhk.co/mepejuwaj/Qbjc8gd/naruzu.pdf
    • http://tujidal.mypressonline.com/9020696769.pdf
    • https://cdn.sqhk.co/ludukuni/PihHRhf/alarm_clock_app_that_plays_music_iphone.pdf
    • https://cdn.sqhk.co/vadavenaw/gegfhho/pitbull_dog_hd_wallpapers_1080p_download.pdf
    • https://cdn.sqhk.co/lepavenujal/jbhebic/vaxupizomekekafatavutezi.pdf
    • https://cdn.sqhk.co/levowexesu/hfaXohh/set_list_maker_app_review.pdf
    • http://zavutuwifuwe.iblogger.org/social_anxiety_disorder_assessment.pdf
    • https://cdn.sqhk.co/jisokemefaz/YVjhE8K/dragon_priest_masks_skyrim_dragonborn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_e4cae2f72b54430bb09a1e51ccf42a90.pdf?index=true
    • http://womawujun.atwebpages.com/sazifevojexosojigugogise.pdf
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_056617145e1643beb57f1e01c8af5eba.pdf?index=true
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_6e731b4e6d71421184c31236fd9b080e.pdf?index=true
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_355ebb7ba84f4f93bfd177d0132b7d76.pdf?index=true
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_90aa6e8afc724117a67aae32a61bb2d3.pdf?index=true
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_5bea1c0e121c454886239e8a5f061fc6.pdf?index=true
    • http://virojokezof.rf.gd/jumpmaster_student_study_guide.pdf
    • http://redifigikutusoj.myartsonline.com/65404180922.pdf
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_826195d40d594cdeb0f1ede36e8bb32e.pdf?index=true
    • http://dujazenemelix.epizy.com/how_do_i_calculate_instantaneous_speed.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_off00011997.bin
6c806c3479ba914de6bad8be64518722c2bd34efb5a685b40d48149fbb8f5081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 5060 bytes
font_01_sfnt_off00012ace.bin
052fc435f79c9710dfb51f7c77a08171af4d6b680e7b2eb080f0c6f894407881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACE 12520 bytes

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