Malicious PDF — malware analysis report

Static analysis result for SHA-256 306420f074ea46be…

MALICIOUS

PDF

160.6 KB Created: 2021-05-29 11:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e3d1ac6a2bd6c9d7c8f94037d6dec72 SHA-1: db1bdd907bb8472e2648755f2ffea89a213567c7 SHA-256: 306420f074ea46bed80ae4dc67a09835e60e0d1c981ecd85e671a43ee24ceef9
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 0.9687

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://leonvi.ru/strik?utm_term=download+yeh+rishta+kya+kehlata+hai+latest+episode PDF link annotation
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/2670797.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409826/normal_60b006577d8ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450730/normal_6026d5121d71f.pdfIn PDF document text
    • https://pemesekisubabas.weebly.com/uploads/1/3/4/6/134659876/fomafamad-duganetalaxif.pdfIn PDF document text
    • https://zixixowiw.weebly.com/uploads/1/3/4/6/134605173/4e61c179ced58cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_601924254e1be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474465/normal_5ff1ceacdc5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_601d520b902ce.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/kokurifebukoturexomo.pdfIn PDF document text
    • https://niladituzisum.weebly.com/uploads/1/3/4/7/134736231/7e3d8108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_6062294537446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_602a2aaa9230a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463528/normal_5fe0340db063c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_600d488eef012.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://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/785b42d6-3cc1-4e9a-8deb-721e6497e097/99167984148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4432bda-4925-4938-9936-5d29bb4bae0f/50772626253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7300c4a2-a7e1-4cce-b632-9dced26f5367/congruent_and_similar_shapes_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6b8a7c-0bb7-47e0-ab32-45a71bf066a3/98181500351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37227ce8-1916-4cbd-8a1e-1ba756fe1d00/best_saturday_night_clubs_in_atlanta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76758c23-ffbf-4a17-941f-7506155d938c/el_diario_de_greg_14_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4e87cc-f23c-468f-90b7-233c43eb844d/53036637814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a76f024-202e-4cbe-80cb-a3b3119d5014/descargar_grand_theft_auto_vice_city_para_android_gratis_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d076a8c-7d30-4ef3-8524-75fd2ae18331/what_is_the_main_purpose_of_a_literary_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1b8e12-b9bf-4ede-8ef9-6d29dd9bdb42/how_to_treat_a_dog_with_demodex_mange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1073c7b2-b1db-41a2-8ace-2ef019daf83c/can_you_track_regular_envelope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e37fcc9-e3b4-4e53-ae1d-1016948f974d/hp_4500_not_printing_black.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2026C 5092 bytes
SHA-256: da7359f1aa6421a61d1a4cd0a0640317ff11753e748d59d65c4e5230d8b3e727
font_01_sfnt_off000213c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213C7 11300 bytes
SHA-256: 8f79a7842a23ba4dea448ccdc906fdab62378e733919dba324c35dc3770193d7
font_02_sfnt_off00023a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A53 16168 bytes
SHA-256: ee2de64994fda5bfb2184f4d4f768977ec5cef1155c47d3477280ede4fd49a8e
font_03_sfnt_off00024f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F75 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_04_sfnt_off00025d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25D75 5988 bytes
SHA-256: c997173b711d8a00a763f1e7f8fbfe3c22ecea82df435ea661fc29b1638f7744