Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac76312e6dfdc48…

MALICIOUS

PDF

71.6 KB Created: 2021-03-15 04:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f24815c13809b5e1f1cc0dbf1a470c75 SHA-1: e99ca204e98d3ecedd4c55f1babdd5e6af80818b SHA-256: 0ac76312e6dfdc4830eac658110869485e745851bd21307287cb19930a64c399
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The PDF structure and embedded content suggest it's part of a phishing or scam campaign, likely using the embedded URLs to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=run+3+unblocked+games+6969 PDF link annotation
    • http://tenipimutav.mywebcommunity.org/78850122546.pdfIn PDF document text
    • https://cdn.sqhk.co/togareguko/bBijjjP/english_2_telugu_dictionary_app.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/anatomi_sistem_reproduksi_manusia.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/ejjhczw/wujatudamegipixotexap.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/hb7Oygc/kopefolajotiramozi.pdfIn PDF document text
    • http://defiboxifef.22web.org/23683777018.pdfIn PDF document text
    • http://josibazuveloj.iblogger.org/bypass_any_frp_lock_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/ghisThb/places_to_play_tennis_near_me_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/jEfnrrL/92641166462.pdfIn PDF document text
    • http://jikonuja.22web.org/98047574156.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nikuzemadol.rf.gd/lg_air_conditioning_remote_control_manual.pdfIn PDF document text
    • http://sesunofopum.epizy.com/birthday_invitation_template_photoshop_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525248d8-fb40-4cfd-84fc-813cba1d3f67/5225259518.pdfIn PDF document text
    • http://netozovozuze.rf.gd/35504627175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e367dcf-751e-4bc1-aef0-2e375958a0f5/10294557311.pdfIn PDF document text
    • http://mujunuge.rf.gd/84395686231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9d7259-a11f-4f8e-8301-cb57007d2332/86326465554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcfe27fc-9cd3-444b-b6e9-b4e65a5220ad/cuantos_metros_tiene_un_km_cuadrado.pdfIn PDF document text
    • http://pageziwakuvagu.epizy.com/oxford_advanced_learner_s_dictionary_apk_hack.pdfIn PDF document text
    • http://piwisivajefi.rf.gd/73435684939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b9fd3a-80cc-4fb6-8a7b-88b9968cf618/am_i_above_average_looking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fbfd7a-51d4-415b-b3f1-74ea9fa83502/how_to_clean_antique_clock_movement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3c6a80-971d-45f5-9a64-a9cc6ed8d01d/what_oil_filter_does_a_2008_jeep_wrangler_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cafbbd-55b4-455c-a22d-8899aa336aae/ryobi_router_bit_reviews.pdfIn PDF document text
    • http://lipitesagodat.epizy.com/do_you_have_to_pay_for_adobe_premiere_pro.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_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 5848 bytes
SHA-256: e38ccde19d85ea750a2b4d9347a0f54ca1388fce7315043f02fbc8d007c4b25c
font_01_sfnt_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 10544 bytes
SHA-256: 031bd1c05ff3b39b428fbfb0a7661d551f9db0ee754da007cd9189c8278f034a