Malicious PDF — malware analysis report

Static analysis result for SHA-256 0923c94dc61a723c…

MALICIOUS

PDF

68.3 KB Created: 2021-03-31 09:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: af9e77f3e904655c913ea9195d5da781 SHA-1: 18d46f1928821314562961ac39af82f9c60564a3 SHA-256: 0923c94dc61a723c0f8665b2db2bb09d662866b1ff24c0a633f7e33ac40bcf14
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://leonvi.ru/wix?keyword=milky+way+remy+saga+gold PDF link annotation
    • https://kasexesupa.weebly.com/uploads/1/3/1/4/131437862/rofonedetemafa-zipavadimovex-fabilugu-guxagavowebuxop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5ffc4d4bb2785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5ff8ff8835954.pdfIn PDF document text
    • http://mishgen.com/26634667173kwcf4.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/75e893a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6022b52e9338e.pdfIn PDF document text
    • https://semulojera.weebly.com/uploads/1/3/2/6/132695334/8595522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_6063f7af8f291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5ffb6dfa0f57d.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/f54a172.pdfIn PDF document text
    • http://nout-sale.site/how_to_set_a_howard_miller_clock_model_625-2360vjal.pdfIn PDF document text
    • https://pidufemimin.weebly.com/uploads/1/3/6/0/136054052/kuxuluw-zogikapere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_603ad2736de0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/dc-_dc_buck_converter_waveforms.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/lewerefo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/werid.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/15943322987.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/jumble_puzzle_answers_for_august_30_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/is_the_girl_in_the_spiders_web_available_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/33281733302.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/tork_timer_parts_dial.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/ableton_live_free_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/migalanen.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_off0000cb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4B 5408 bytes
SHA-256: f1fd110502533c97e3a286953c5985f52708133aae1ed571b6f54c417627f6c1
font_01_sfnt_off0000ddbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBE 10804 bytes
SHA-256: 95950db20303241d26cbe0a93b2e395f43f5f8ed15bd34612c495716a0c44fd7

Open this report in the interactive analyzer, or submit your own file for analysis.