Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae48d9ceb1b381a…

MALICIOUS

PDF

72.7 KB Created: 2021-06-01 09:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 73e056154bcba4b436a3a23d7d1b81a7 SHA-1: 81aba1b50c00b3f1d5f3f9e0c280ae871a955753 SHA-256: 5ae48d9ceb1b381a624f8ae221184aa4045c0a632dd2c7c786306c6eb28b766c
186 Risk Score

Malware Insights

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

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 0.9956

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://smidgel.ru/pbw?utm_term=shutter+island+full+movie+in+telugu+watch+online PDF link annotation
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/ralilogegibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474176/normal_5fd18ddedf577.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5ff097d4aaf89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6035f5c19d3e1.pdfIn PDF document text
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/jubawazenudovi.pdfIn PDF document text
    • https://tasufevijusenix.weebly.com/uploads/1/3/0/8/130814010/xiwafig-dogara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_60662291a466a.pdfIn PDF document text
    • https://rabageberavabi.weebly.com/uploads/1/3/0/7/130740124/linexufuminup_vetux_xelivakezijodav.pdfIn PDF document text
    • https://tebadigizowi.weebly.com/uploads/1/3/4/1/134109241/1574965.pdfIn PDF document text
    • https://nufomesamibu.weebly.com/uploads/1/3/5/3/135332564/wezipi_negerudako_dudodigapuwal.pdfIn PDF document text
    • https://jigaxokere.weebly.com/uploads/1/3/4/6/134622899/bopomiwurul-letezafafidu-xabewafa-bisebatikek.pdfIn PDF document text
    • https://bezawilunopas.weebly.com/uploads/1/3/4/7/134722101/xupunuxo.pdfIn PDF document text
    • https://rurefisofe.weebly.com/uploads/1/3/5/3/135325463/dagadixiviw.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/rofixif-mepuze-jiratamu-resepa.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/09b14d77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422643/normal_6067da2075a84.pdfIn PDF document text
    • https://luxituwane.weebly.com/uploads/1/3/1/8/131859527/aa93ae8665.pdfIn PDF document text
    • https://bivamotitujodo.weebly.com/uploads/1/3/4/7/134712473/2383883.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/c77bc459-a4a1-4d67-9274-c6601462cf8a/good_warrior_cat_names_for_toms.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/mijokosimimurako.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/lista_de_exercicios_multiplicao_e_diviso_com_numeros_inteiros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68fdff03-79b0-4ec0-8fcb-5868c69e2908/left_behind_series_in_order_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d0b686-25c6-496f-9cc0-23109e110b91/netflix_the_crown_series_4_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03ff23a-be52-42af-ba9a-d99165cb4d25/25981151751.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144422877/how_to_measure_house_wire_gauge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554d1bda-e2f8-4c28-af8e-9fa2e17ba9de/the_moral_of_the_story_an_introduction_to_ethics_ebook.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/43343784848.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_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 5692 bytes
SHA-256: b12b9269abe538433ec7407d2300424014b1508eaee39ec2155bf4987629e6f8
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 10680 bytes
SHA-256: 912f2f2b176bb8e2c0e301a9f96735a9e47eaeb1e62192e950230f2955506621