Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d4004d0394664b…

MALICIOUS

PDF

83.8 KB Created: 2021-06-06 19:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65230f9396fc82afa66b294e1fdbf716 SHA-1: 72d3288eef56af2a4cfa9d8d4632567b5618735f SHA-256: 09d4004d0394664b01b46b513a915b0f87984c6fd202431fcb91b174a6f236a4
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/pbw?utm_term=convertire+documenti+pdf+in+word+gratis+online PDF link annotation
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/7543038.pdfIn PDF document text
    • https://xomivevisavuwog.weebly.com/uploads/1/3/4/8/134852088/samofefutupato_robed_migev_wikuxid.pdfIn PDF document text
    • https://fuxoneji.weebly.com/uploads/1/3/1/4/131437311/7807397.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/bizulopaf.pdfIn PDF document text
    • https://rudumareta.weebly.com/uploads/1/3/1/8/131871695/6900978.pdfIn PDF document text
    • https://tikigafose.weebly.com/uploads/1/3/0/8/130874564/4951570.pdfIn PDF document text
    • https://jivetekerujurar.weebly.com/uploads/1/3/2/6/132695216/zibegena.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/1161289.pdfIn PDF document text
    • https://wofarugufi.weebly.com/uploads/1/3/4/6/134657174/sugisaxipufizu.pdfIn PDF document text
    • https://fusagepewaliwe.weebly.com/uploads/1/3/5/3/135325652/mudikunafapebetovo.pdfIn PDF document text
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/8365016.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/1320055.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/wowuma.pdfIn PDF document text
    • https://jesiwiluvilad.weebly.com/uploads/1/3/1/8/131857580/kavijufed_pugozapakoneg_matigewapitamak_bulezowuk.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/3486035e-3152-4b50-88b8-c50f9d232b61/anatomy_and_physiology_position_terms.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/w/file/fetch/144475320/ghost_recon_breakpoint_crossplay_stadia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0f9e36-f033-4e4b-849f-5850b0bc1f49/gejopijomukajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4880b499-d6a0-49d2-adf0-a1b629f60449/how_to_make_a_ribbon_bow_for_a_gift_box.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/w/file/fetch/144587763/pirates_of_the_caribbean_full_movie_tamil_dubbed_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04313b0b-ea5d-4f7d-8276-818754783e25/how_to_make_symbol_bigger_in_latex.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144458559/nupawisazeniti.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_off000109c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C9 5532 bytes
SHA-256: 78d5011af3c0027d2b8653ad09eb6059265b8d1a3ac05f2e39d24e076ed9d8e4
font_01_sfnt_off00011c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 10876 bytes
SHA-256: 87c1c4bf952d3b16b7729f2bebcb2f73bf2f600416b119b451ae299d73a98d0c