Malicious PDF — malware analysis report

Static analysis result for SHA-256 f363cc2f56710617…

MALICIOUS

PDF

77.1 KB Created: 2021-03-30 16:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3bae761f900ca04466e25ebba62778ac SHA-1: 5e1f17fac666dc0eb3a086483267857fa864fb16 SHA-256: f363cc2f5671061752bf1716c4a432262119fee394cf20fa3b02b77afa36cfd7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://kuzutuzo.ru/wix?keyword=atari+breakout+unblocked+games+at+school PDF link annotation
    • http://zelenege.iblogger.org/how_to_unlock_a_locked_tracfone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_60430d71eef08.pdfIn PDF document text
    • http://fojekoxezosuko.22web.org/phonics_lessons.pdfIn PDF document text
    • http://giveaway2020.info/kaduwaxipafusumebqz8k.pdfIn PDF document text
    • http://jixaravaxagisuf.22web.org/8_ball_pool_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_5fcabb9c40786.pdfIn PDF document text
    • http://allerop.xyz/47143452097o0m27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_602e45dfc6652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_6061076e574b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_3d5829021a4c4aecba4423a310cbd4ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/what_is_biblical_higher_criticism.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_c2e78a1678114151a535f42d4030a38b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/birthmarked_free.pdfIn PDF document text
    • http://fitewamulifat.epizy.com/vezixapumerasi.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/bang_bang_theme_music_ringtone.pdfIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_ca20951a8c794908b51a46f34b1b6959.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_89c4c2de961c429e845314dc4eac8aad.pdf?index=trueIn PDF document text
    • http://poziluxolebulu.epizy.com/nelsonville_ohio_police_reports.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_9f1fb4fb19014856ac062acf04a24c23.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_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 5544 bytes
SHA-256: f64e78ee62bbf7eff1bddbee5325e0668f898ac8e6fc4587eb3e40f576177d3e
font_01_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 10932 bytes
SHA-256: 2f0e9458bb4f070a94fa029035f748b1419aa597afd367aabc2c975da69c46ce

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