Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b36e363c9ae2946…

MALICIOUS

PDF

78.8 KB Created: 2021-02-26 20:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7a7e4e8b8350576594e2cb87cbde3d5c SHA-1: d23409cb5e53931dc51015fe9e1a5a3165766ad5 SHA-256: 6b36e363c9ae2946ad2bcfc09515f3803d010fe2e180faa847ded42a0fd3c834
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to potentially malicious or disposable hosting domains, indicating a phishing or redirection attempt. Heuristics confirm the presence of malicious redirector links and a link farm strategy. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to external malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=how%20to%20cook%20salmon%20on%20the%20mediterranean%20diet In PDF document text
    • https://lukikezifad.weebly.com/uploads/1/3/4/7/134756415/gewiterowoxususaw.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/7603977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_6019bbb871cd3.pdfIn PDF document text
    • http://hrushch.space/adverb_clause_worksheet_for_grade_7t770f.pdfIn PDF document text
    • http://want-seo.ru/fupodipezuperiolf8x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456132/normal_5fd9fff42181e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451950/normal_5ff50b3f05340.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/26308417435.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/sindrome_abdominal_agudo_pediatria.pdfIn PDF document text
    • http://cmb-accueil.com/life_beginner_teacher_s_bookkfeo4.pdfIn PDF document text
    • https://vadukoku.weebly.com/uploads/1/3/4/7/134707593/1673708.pdfIn PDF document text
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/fudewasetu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/rancilio_silvia_v4_vs_v3.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/3603109069.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/what_does_blinking_red_light_on_thinkpad_mean.pdfIn PDF document text
    • http://sasaroguri.rf.gd/all_black_haka_video_free.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_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 5296 bytes
SHA-256: 8d8b9ed88f9b40924ab1ecd377ac79e98213be51667e9be8889988187abce76c
font_01_sfnt_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 11228 bytes
SHA-256: a1a8cdff6cece1334e962f9b3253b47531eb2699505f50f05a66114b558c4a7c

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