Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e803b439ef1d62…

MALICIOUS

PDF

72.2 KB Created: 2021-03-15 11:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a2c215f154d6f60146637779f29782e8 SHA-1: 1e0df7e4d9e57c9775ba52706f979983672f5323 SHA-256: 47e803b439ef1d62fda055f4ab36601ba2810aedad19ad5b4879d015f026048c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=technics+sl+d202+manual PDF link annotation
    • https://cdn.sqhk.co/wenewojufaj/fgehdhj/tunabowuzetowibiterota.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/hbZQ4oe/repasuvaxobo.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/Thd0gfc/hearthstone_deck_tracker_arena_guide.pdfIn PDF document text
    • http://vukosam.22web.org/wadox.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/a7r4PE4/maxanoxovubulasilokes.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/fujuza.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/nexapuke.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/fngf6gc/37411417830.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/cNKrnD4/13841501088.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/jHeWCji/apple_dessert_recipes_dairy_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/iifYDKe/doviroxogovunezip.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/wotexubaj.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/idihaja/baby_pandas_rolling_around.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/UljeuXI/71597055754.pdfIn PDF document text
    • http://nelawetazabuta.66ghz.com/25861242128.pdfIn PDF document text
    • http://taxutipepavij.iblogger.org/54375010550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_0ed408d0591d42a9bed1188033fbaef8.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_f936c87f89d047d4a4554508bfe1b42d.pdf?index=trueIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_362d35e224b14a9d89266a4373885d3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozilum/corian_material_for_kitchen_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/mathematical_logic_kleene.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_e3823201144641b8a640185d9f5eacfe.pdf?index=trueIn 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_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 5304 bytes
SHA-256: df0118d0e208f384f689f1d979f74c412c59228f53cc70fd4b120826d9bd08df
font_01_sfnt_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 10924 bytes
SHA-256: b67f48ba62740c177985ef2f56edbd7ad76efc0e325881cbd721a34e3c0d2847

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