Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c593f2d06956368…

MALICIOUS

PDF

87.0 KB Created: 2021-01-13 21:26:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: acc1d4e79ba787d1e337d77947f83d6d SHA-1: 9fac0c2c72eff05d538019d54f1a6b207af07ab3 SHA-256: 7c593f2d069563682924e7ab6603a6479ce7b0190e61c262c1adae91164b81f7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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
  • 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://trafffe.ru/123?utm_term=first+aid+merit+badge+worksheet+2019+answers PDF link annotation
    • https://site-1178784.mozfiles.com/files/1178784/43295625463.pdfIn PDF document text
    • https://zelubofiwexuf.weebly.com/uploads/1/3/4/2/134234915/lokabolojogowe.pdfIn PDF document text
    • https://wumetitazidizo.weebly.com/uploads/1/3/4/8/134885052/916ff370dfa159.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/zudavaferadogafuped.pdfIn PDF document text
    • https://site-1194102.mozfiles.com/files/1194102/mrcrayfish_furniture_mod_1__15_2_9minecraft.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/ruzolupizuvabo-tixaj-bafajipasi.pdfIn PDF document text
    • https://site-1168030.mozfiles.com/files/1168030/rupelukelejos.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/DgqrLgg/okc_thunder_coaching_rumors.pdfIn PDF document text
    • https://tazeviguso.weebly.com/uploads/1/3/4/3/134339516/rimodalowar_lawapen.pdfIn PDF document text
    • https://site-1171785.mozfiles.com/files/1171785/bengali_new_movie_480p_-_skymovies__in.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/8734286.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/8514832.pdfIn PDF document text
    • https://site-1175077.mozfiles.com/files/1175077/vivaldi_four_seasons_summer_violin_sheet_music.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/donarepemi/64466271065.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 5940 bytes
SHA-256: cd5eefcc42e4ff11e92eed23f3c5abd6746f1a1c9018b971151a06f129d2a366
font_01_sfnt_off000127a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A1 11396 bytes
SHA-256: c614062d1957a97b30c2553245764665a7b9103c9bb78497a851031f48f40a43

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