Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb0e366249e7f7c…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 01:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 99fb3c243ffaaf18362fc6aab30dff9e SHA-1: ab362953683187b553cca0e801be77886c005b08 SHA-256: adb0e366249e7f7c88d0a36a9f6192e4c5b9a1e051115147912f12397c47ff7e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high-confidence heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text related to public management earnings, likely a lure to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=how+much+do+public+management+earn PDF link annotation
    • http://ezfix.asia/valazilovawugokapoxuvbef7y.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/wbFotid/11208378125.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/hfiihaL/drive_in_movie_theater_open_tomorrow.pdfIn PDF document text
    • https://cdn.sqhk.co/sozedikepasu/egfhehj/crookes_brothers_limited_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/FjcfIhj/at_t_u-_verse_tv_packages_and_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/nitumatemi/YAVgiij/hot_springs_story_apkpure.pdfIn PDF document text
    • http://mnatural.space/56820861752sanhn.pdfIn PDF document text
    • http://verifybadgehelp.com/ccnp_route_examv1eqt.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/ifgigic/21671074512.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/telugu_letters_practice_sheets205i3.pdfIn PDF document text
    • http://tryporte.xyz/the_sorrow_of_war_themeswtw6h.pdfIn PDF document text
    • https://cdn.sqhk.co/lofujumixas/MhfBjha/dynasty_warriors_gundam_2_trophy_guide.pdfIn PDF document text
    • http://muvajopumo.22web.org/what_not_to_eat_on_a_dairy_free_diet.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/hgSHjcv/contemplated_meaning_in_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/196395dc-f82a-4f1c-9667-0c5729dd898f/sawuposebaf.pdfIn PDF document text
    • http://nasarijexu.epizy.com/yellow_fever_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ceac6a-91cd-48d8-968f-e040719ef555/sorikim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee42721b-bbce-439d-b5a6-4b81d88ebb8c/4156595474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c3ee42-cc8c-48e7-afe2-8b6e7af54370/20952625632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f850bb3d-165f-47de-ba71-f8e45668ced4/hoover_dual_power_max_carpet_washer_fh51000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e018054b-960b-4ebd-a96b-d0f4a9cc89af/what_is_organizational_breakdown_structure_in_project_management.pdfIn PDF document text
    • http://kilisajafe.rf.gd/ispad_clinical_guidelines_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570e9bb3-faa9-4866-91d3-afed264b5c28/neranuvewebev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85d9598-6014-4f0f-a958-59805484e21d/what_are_three_examples_of_safe_work_practices.pdfIn PDF document text
    • http://baverasoge.epizy.com/thrawn_alliances_read_online.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/22240287278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dba582-d23f-434b-b5de-0a340ecb296b/ragira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d9b109f-398a-4921-9bd7-69e0a1cbb45f/a_peoples_history_of_the_world_audiobook.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 5500 bytes
SHA-256: 27d7e1c1835b5ac213db83096a684d6da34644de685b75bf02b10ffbeecec13e
font_01_sfnt_off00010d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1F 10572 bytes
SHA-256: 3d529cd401e3f8c667c1f2e0366d00603d67aff0dfba2fe7e0f42ae16cac1194