Malicious PDF — malware analysis report

Static analysis result for SHA-256 72eae41ff7ea61c0…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 14:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04e2641ec22450fa0ce29c95af52bcf3 SHA-1: 0a69d3dfca47cf8b8728109a5c28a292347661e5 SHA-256: 72eae41ff7ea61c03177b06dfd8f570df4d7137d03a25f135fdbfca4c66a8c89
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute traffic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The presence of a 'download' button lure further supports a malicious intent, likely to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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://baarspo.ru/award?keyword=behlol+dana+book+pdf PDF link annotation
    • http://iglivesupportteam.com/delphi_xm_radio_bluetooth_pairing0hlp7.pdfIn PDF document text
    • http://natur-green.fun/86054180244wprg7.pdfIn PDF document text
    • http://changepass.online/fekakiwugenakojezapuzukij18rsl.pdfIn PDF document text
    • http://birjand.design/god_alarm_ringtone_freetqub2.pdfIn PDF document text
    • http://petersikdar.com/db_realty_annual_report_2016zelop.pdfIn PDF document text
    • http://20970907.net/free_download_hide_and_seek_game_full_versionj4zdx.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/principales_carreteras_de_mexico.pdfIn PDF document text
    • http://remont-pc.website/breezin_thru_theory_answer_key_chapter_1atup0.pdfIn PDF document text
    • http://localdesign.me/saboluladixisemasasinosw4l.pdfIn PDF document text
    • http://options.expert/7993033625e0lal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac911ccd-a574-46a9-bbb3-57bb927ff796.filesusr.com/ugd/2735c9_85f7967e3d16457ba799ae9a60f8097a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b530f6-2736-45bd-aa77-48b6d84947ee/bavovekonoforusawesi.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_e56a7e6402c9437886253e01ad13263a.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_dffc059a24374e218841c7b80eb20c28.pdf?index=trueIn PDF document text
    • http://wutorokanotomav.onlinewebshop.net/oxford_dictionary_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7351f1ed-5d1f-49c8-a88e-d03924ae3075/cuntos_tipos_de_funciones_cuadrticas_hay.pdfIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_21c508e863b740019505850cf5c764c3.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_f9c95bd7ccd8496188e0b01d1c348102.pdf?index=trueIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_44f7501c827d4316b6d683c35aa2f758.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_6387a86a0cfd4fe0ab3610fa1aed7302.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9dd15e-a026-48f0-9535-8be1c03c3f63/nedisagasometa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988571ca-a35b-48d0-acad-efc8b5f86228/89168864983.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_0ed4caa7e6fa4f54aab262d0d2b52a9a.pdf?index=trueIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_e86071103e324649ae0cdb0870cc08cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85944eef-77bc-43f2-bca5-acc73fdf458e/pivowa.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/97065726171.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_off0000d2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DB 5108 bytes
SHA-256: ce4513fd389558ccf83004d366668822bafce888c9bf2afc6afd8766e2aa09a0
font_01_sfnt_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 10228 bytes
SHA-256: 6174dcbf4fb48c19942b4f3893a7ecc08af6407f20fd37af8bff0c8a4675e900
font_02_sfnt_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 18276 bytes
SHA-256: 638ac311f583392e0580ae2fe1f11b2ad54c561ef8d4c604be4d9087c7458fe9