Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcc0b1b023d8d42…

MALICIOUS

PDF

83.5 KB Created: 2021-04-06 15:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 154717542f5d6d2bfb9280c5b56a0b21 SHA-1: de58880991bda5ab92d8f8ee7f3b262a6210ad5e SHA-256: 5dcc0b1b023d8d42db576507f3d6bd5083810db421907114a1e0a2c4234af96c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/wix?keyword=punnett+squares+practice+worksheet+2+answers PDF link annotation
    • http://pufivuziviv.mypressonline.com/lefizuxab.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/xWji0qx/netatmo_weather_station_review_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gofejenizew/g8JVZBm/13597523000.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/RjijbBi/sadireranajefiburid.pdfIn PDF document text
    • http://lisifakus.66ghz.com/chefman_digital_air_fryer_manual.pdfIn PDF document text
    • http://trenketo.buzz/juliwovewefatedekixususo8r5gu.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/yighejc/bubble_tea_phone_wallpaper.pdfIn PDF document text
    • http://net-klientov.ru/guidestar_platinum_logo_vectorrqnk8.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/sasomakamewifotoluf.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunusol/haieE73/tip_calculator_on_apple_watch_5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/learn_spanish_colors_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/over_the_rainbow_piano_chords_and_lyrics.pdfIn PDF document text
    • http://fiwemigusa.rf.gd/rawazisusijurosog.pdfIn PDF document text
    • http://nolazukij.epizy.com/brillat_savarin_the_physiology_of_taste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8fb653-b5e5-4576-9ef4-2febe8f9fc93/civil_engineering_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d263556-6c2a-413f-b359-b8d61c5c75e9/pentair_easytouch_control_system_wireless_control_panel_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a619fbe8-eab9-4666-82f5-b8c72feaec64/arduino_uno_r3_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/14601390166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/790bf682-6832-4184-9189-c5eeaacc9c3a/62611049979.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/abu_garcia_ambassadeur_5000_parts_list.pdfIn PDF document text
    • http://gezixus.myartsonline.com/zarewapaxin.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 5404 bytes
SHA-256: 48ed754ffc0326561571995c87b9e827d15876aa9f2bdeca9b2a3740fa9dad38
font_01_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 11732 bytes
SHA-256: 8e21434e901f258579fda2bc8210d6c480a0b0a3d96fe3c9e04dc3c153cf7254
font_02_sfnt_off00012b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B45 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2