Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df38779f872e929…

MALICIOUS

PDF

74.8 KB Created: 2021-04-03 05:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 415684050ff1a34af87f02efa278940d SHA-1: a97e078aee7db53a25faac7959ad34da84af78e5 SHA-256: 1df38779f872e92962c8ad5c8b2990c6f6392fb840362c68b78a25adcf968412
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=fast+find+people'. This indicates the document's primary purpose is to redirect users to a potentially malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=fast+find+people In PDF document text
    • https://cdn.sqhk.co/zururodi/UI2hct7/allegiant_stadium_inside_tour.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/hbxCAgg/fbi_special_agent_education_training.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ha2AihS/suwejiwusov.pdfIn PDF document text
    • http://sell-toclick.online/how_to_change_element_in_glass_top_stovegp2kc.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/2hfgjhh/dakerovoselarotelupeg.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/gihfPhe/unity_remote_5_not_working_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/bgfhdXP/96650460252.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/tVOqyid/noblemen_1896_apk_and_obb_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/W7hjgcl/pagebosukaradagumaxofoba.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/68a0d9cd-b3ad-43b7-8ae3-0a61d9a437e9/noguluvopimizukawekat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d210a74-03c0-4636-9e63-592aa0c929e8/zigetu.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/what_exercises_are_good_for_golfers_elbow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d2184f-aaaf-45a8-bd2a-1a4a7e0aee56/evh_5150_iii_lbx_1_vs_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbae6ad-5b86-40d3-a0db-0ab5208bde72/janenilajiterenajimusud.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/2013_subaru_impreza_wrx_horsepower.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/mofiwifelizononojipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def8b7df-da5a-4992-b5d6-5d27e469a98a/thesis_statement_worksheet_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbaf875f-8fda-44ce-b853-dc34b50fb8c9/kenmore_elite_smartwash_quiet_pak_9_model_number.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/varubudelesudovosivaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bab455-359b-4f99-896a-99c75ba3df91/algebra_ii_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/reading_worksheets_for_1st_graders_free.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_off0000e8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C5 4896 bytes
SHA-256: 44490c1eb3195649b7bc508caeea920a611806bf86a86559f9831b1843aed4e7
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 10656 bytes
SHA-256: f1b1c99e4ef6c98fdd3f72d2ca1fa628cc98eeefcb401c1f69f3b603bcdd8b6a

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