Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b097e503df0767…

MALICIOUS

PDF

77.7 KB Created: 2021-06-05 16:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9aefe77670a36d6131a972613f479708 SHA-1: 5ae6f0d195c1e5650a715a33e50d79baa430fe6a SHA-256: 93b097e503df0767e5e0bafcb5f870a98c445f8b2de054c738257931f581ee49
186 Risk Score

Malware Insights

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

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 0.9989

Heuristics 6

  • 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 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.
  • 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://irlanc.ru/pbw?utm_term=color+picker+procreate+app PDF link annotation
    • https://bilobunu.weebly.com/uploads/1/3/5/9/135969114/lafesiletum.pdfIn PDF document text
    • https://mobasukirogejus.weebly.com/uploads/1/3/1/4/131453019/19ccd7a7d075.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/rananajija.pdfIn PDF document text
    • https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/7718526.pdfIn PDF document text
    • https://kuxesilivalagi.weebly.com/uploads/1/3/5/9/135963561/1637649.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://famukaser.pbworks.com/w/file/fetch/144423603/fajetedapawokevoxamupolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a501376-2cd1-4d76-9102-8e599ecafaef/how_to_measure_sleeve_length_charles_tyrwhitt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b532ede4-139a-45d9-865e-2068fbbb405b/kupamikivinemeput.pdfIn PDF document text
    • http://pupowivala.pbworks.com/w/file/fetch/144642336/barrons_sat_prep_free_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e86eaaf-515c-4c38-91bd-50a36d7c2e4e/86753507601.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/f/profile.dat_dls_19_hack_download_mediafre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49be6da-dc54-4b83-9c3f-22297701a4b5/how_long_for_ac_joint_separation_to_heal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4ca6a2-6c93-4697-8c82-59b1e5582bc7/how_to_use_pellon_fusible_interfacing.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/how_do_you_cook_a_frozen_pizza_in_a_convection_oven.pdfIn PDF document text
    • http://dowiginade.pbworks.com/f/70461233612.pdfIn PDF document text
    • http://zusemivak.pbworks.com/w/file/fetch/144591819/litikosaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab2a36d-928c-4fdb-8f57-8c24b37715e9/bevofopimewomoseliguvupol.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/pojamadafakenitakajupu.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144531825/shadow_fight_2_ios_hack.pdfIn PDF document text
    • http://bowawesup.pbworks.com/w/file/fetch/144612228/what_kind_of_fruits_and_vegetables_are_good_for_dogs.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144522303/e.__j._gallo_winery_600_yosemite_blvd_modesto_ca_95354.pdfIn PDF document text
    • http://fubajulak.pbworks.com/w/file/fetch/144426345/binocular_repair_manual.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/a1_smart_watch_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1e3583-e6fb-44b9-be42-056c68a66fbb/how_to_apply_the_7_hermetic_principles.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/what_is_report_code_25.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 4516 bytes
SHA-256: 440278dc46de8131d639f992cb7c40891c8d88127195a34bf786590e2fd85bb6
font_01_sfnt_off0000f906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 9984 bytes
SHA-256: 5aa36bfa9039a4a01bb8aa8bbe84e9e4df81bae1ba42e96c8b0c8f35388c855f
font_02_sfnt_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3