Malicious PDF — malware analysis report

Static analysis result for SHA-256 972fd094d123051c…

MALICIOUS

PDF

74.1 KB Created: 2021-03-23 19:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5436452b3570d4a33443881dd84c5c56 SHA-1: 9d702937e464bd98be2b18756c8ca114a7e658bf SHA-256: 972fd094d123051c832ae5b9f7821f50f6d40f40bfa339b198f6d00d85a748db
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://jumiwimov.ru/award?keyword=attendance+system+thesis+pdf PDF link annotation
    • http://bixaxivajujojar.mypressonline.com/gopro_4_silver_as_webcam.pdfIn PDF document text
    • https://kamapapidez.weebly.com/uploads/1/3/5/9/135962567/6078345.pdfIn PDF document text
    • http://xijivedijimidip.mygamesonline.org/samanibowazufofobajuka.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/gopenemuvuxavevejibatoged.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/yiblC2U/nurajavojutebugawir.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/c5OeThb/good_times_bad_times_bass_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/bhhiphc/xbox_series_x_price_vs_ps5.pdfIn PDF document text
    • http://rifijetuvijilam.medianewsonline.com/bebiliw.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/cVwigft/9130988674.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/jgcjaia/nibowezanigigorokada.pdfIn PDF document text
    • https://kawififelotus.weebly.com/uploads/1/3/1/4/131437833/a82ea0cd9.pdfIn PDF document text
    • http://jarokixepoweso.mypressonline.com/srimad_bhagavatam_srila_prabhupada.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/e73096aa-77ab-41fc-a71e-2d666ada3328/apple_airport_time_capsule_2tb_5th_generation_model_a1470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baad023-355b-49d9-becd-b675316abaf8/wordpress_login_redirect_not_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5f05ab-4a31-4c5e-8b29-8f83064d742c/suunto_core_black_battery_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0032abfd-92a5-4335-a96c-e70b86ab7846/cuantos_kg_equivale_un_metro_cubico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d9e1bb-a543-495d-9b3f-2b101723f77e/c_interview_questions_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/77998511720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3d2ed0-8be4-4b83-840c-8f89f3c3d1b8/kewiki.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/the_fountainhead_by_ayn_rand_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72f0579-c521-4c5b-a35f-013cef5a9559/97564674345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523b7363-7771-4a2d-a475-d7c42cf981e6/64208483933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caeecf69-02f7-4f86-92b8-d1b8942bde77/how_to_search_google_play_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe052f8-a641-4091-a423-f4fd2c7be40d/how_to_fix_ac_leaking_water_inside.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/fosovaxapoko.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_off0000e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 5356 bytes
SHA-256: 616dd8bdd9ccc3fc3a000079e1a9207a7cf3652f36d22c944212dc7c82eb45ca
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10036 bytes
SHA-256: e6ffba143e5826369c9b0271f16525d7d50c63c43d8cb55dfaf52f468cd48486