Malicious PDF — malware analysis report

Static analysis result for SHA-256 287e7ef0ff493367…

MALICIOUS

PDF

75.3 KB Created: 2021-05-22 09:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 16832bb11ac55b2a7dc4b381e3049742 SHA-1: fda7841ccd57f8b634a003db28c46e20f3577d35 SHA-256: 287e7ef0ff4933672f07348cdf3edca25f39287810f38b16b27427fce28253f8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicative of a link farm or phishing campaign. The primary URL, 'https://gimoguvi.ru/strik?utm_term=ver+pelicula+principe+encantador', suggests a lure related to a movie. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=ver+pelicula+principe+encantador PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381320/normal_5ffa8423e4ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_602002eb7e1f3.pdfIn PDF document text
    • https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/nuditonejadugebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5fc98f9754d7e.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/relefuxiziza_maxinizeb_dumer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_602b029189a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_6039e0208619e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479224/normal_603c5a0468809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388424/normal_5ff85bffe6c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_6040a95e51dca.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/fe804fbef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_601fd1484e658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_6000b60ee2a09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468261/normal_5ffc631a5e2e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_605585551a40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_601d9f3b679d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_6010218154d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_5fd89001aeec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_6061de0f47e4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_6018300a8fd24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5fc871ee54fe0.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/goviwigax/womawuvekakakofosinax.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/20704182418.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/comparing_paleolithic_and_neolithic_eras_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 4856 bytes
SHA-256: 23e029aa75b2c9babdeca5af74e970542db7de7c039f37ca0439af87a252a466
font_01_sfnt_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 2080 bytes
SHA-256: 312219753f3408ef35343611a0f5fb07e4c4fc97ebd7c466f3de94c479665445
font_02_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 11452 bytes
SHA-256: 989178e72fc5ad314605b56839a4621024c086391827684b443c4ced6987ab1a

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