Malicious PDF — malware analysis report

Static analysis result for SHA-256 871169bfbdb59cce…

MALICIOUS

PDF

76.3 KB Created: 2021-06-03 09:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a14645b10f5a3153e45f9afadb6bce30 SHA-1: e1209ebe3f6151201c5edd9a75def07013d318de SHA-256: 871169bfbdb59cceb158a4139a17f5346d81b135c8e7381ac703d6312076d0bf
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which are identified as potentially malicious redirectors or part of a link farm. The presence of a malicious redirector link and the overall structure suggest a phishing or spamming campaign designed to lead users to harmful sites. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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/123?utm_term=haagen+dazs+ice+cream+menu+pdf In PDF document text
    • https://kogamawuxeg.weebly.com/uploads/1/3/4/5/134581879/vakafogus_xujazisuta_lebewora_dazemozofudad.pdfIn PDF document text
    • https://kupefuvewugixo.weebly.com/uploads/1/3/4/8/134849821/temexal.pdfIn PDF document text
    • https://jobeluraxofedir.weebly.com/uploads/1/3/4/3/134317239/dudedinuvejuxuz.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/3ba48cbd-41ea-4fbc-9b44-301975a1cf7e/energizer_battery_charger_flashing_red_and_beeping.pdfIn PDF document text
    • http://sikovifif.pbworks.com/f/munna_bhai_mbbs_full_movie_hd_download_worldfree4u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bef0ee5-1e58-4a7a-b8d1-6b101b813f7c/judamuduwofawivujokimom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d7ed4b-4e54-4238-ad24-f0691bb495d3/781869046.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144436968/jibexalinerageru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b405e4d-c069-4974-af6a-f73f746909c3/85031415080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02274e60-d333-415e-ac2b-2c1d4faf2277/what_are_the_main_elements_of_financial_reports.pdfIn PDF document text
    • http://lexibitite.pbworks.com/w/file/fetch/144536583/saunders_comprehensive_review_for_the_nclex-rn_examination_8th_edition_test_bank.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/how_to_reset_a_bryant_digital_thermostat.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/geometry_dash_2.111_apk_hack_todo_desbloqueado_para_pc.pdfIn PDF document text
    • http://tijigika.pbworks.com/f/captain_tsubasa_ps2_download_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b505cdef-f4f6-4445-ba7b-9084a31cf75d/transit_anna_seghers_chapter_summary.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/can_gyms_open_up_now.pdfIn PDF document text
    • http://pusavivo.pbworks.com/f/goxuf.pdfIn PDF document text
    • http://numefen.pbworks.com/w/file/fetch/144539712/syllabus_of_bsc_1st_year_maths_kumaun_university.pdfIn PDF document text
    • http://bilabegape.pbworks.com/f/90840493939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f3487f7-4c19-4da3-9d7b-d0a4639ad1b0/4732575406.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_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 5456 bytes
SHA-256: be840e65ed9b038df07138fa2d358bdc097dd88c45a6e44dd55879d76ecce7bc
font_01_sfnt_off0000fe47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE47 11268 bytes
SHA-256: 2961c22dc83bdc83f4b986da9ea102643e1e2ff9c8dcd2a2e1f7d83be453b68e