Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75ecf1c2757cb16…

MALICIOUS

PDF

82.7 KB Created: 2021-04-02 05:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4db848b706b1d9f24ae436ca7bda9081 SHA-1: ba58653964ec6cde7cbe68430fcdaa67cdb3b8f5 SHA-256: e75ecf1c2757cb16cee69f75f934624ca9c502f7cf8b0f6784a87e8ec7bb9423
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm designed to redirect users. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/aws?utm_term=behind+closed+doors+cast+telemundo PDF link annotation
    • http://wusozupu.mypressonline.com/kalender_2020_sachsen_anhalt.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/how_to_clean_disc_drive_ps4_slim.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/how_to_replace_heating_element_in_tumble_dryer.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/what_inspired_love_in_the_time_of_cholera.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/20710259776.pdfIn PDF document text
    • http://logunesunoj.medianewsonline.com/3433982979.pdfIn PDF document text
    • http://vemelaribox.getenjoyment.net/dieta_para_ganar_masa_muscular_y_perder_grasa_abdominal.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/the_reluctant_fundamentalist_chapter_1_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/icUjjgd/papem.pdfIn PDF document text
    • https://cdn.sqhk.co/dimawenibad/X9Y9DMu/merchants_bank_cullman.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
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_5bfba2fe38d44c0b87f20029e6d33d0e.pdf?index=trueIn PDF document text
    • http://rowesupigoz.epizy.com/jonapudazerotefufenox.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_69f27025b12e45a080bd8fa21a0183d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a2fdc9-30e6-4c9d-bba0-74e5c480f37b/13599318823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50f89aa-0773-4b83-866a-818132e4b418/how_to_fill_a_hoover_steamvac.pdfIn PDF document text
    • http://vibosaxijus.rf.gd/steam_boiler_notes.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_9a09a6da34ae4473af74aa6800943573.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7281fcbd-b303-49a9-b4ab-9e523f14243f/lomowuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469d054b-5a24-42f5-bb9c-bb97a4707d5c/10742190446.pdfIn PDF document text
    • http://fobegakolu.epizy.com/cisco_network_security_engineer_job_description.pdfIn PDF document text
    • http://komadolosa.rf.gd/dukinafizugejilagenu.pdfIn PDF document text
    • http://simarawi.epizy.com/word_bookmarks_not_showing_in.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_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 5108 bytes
SHA-256: 8e27886a2374c81a1a7b9d9959c8cd7680438df6853804445f4b9c345db9e8b4
font_01_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 10624 bytes
SHA-256: cdce2d40392c8db3e133ff8c379281e8d290e842390f343e0d1b37f7d03a6e50
font_02_sfnt_off00012cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176