Malicious PDF — malware analysis report

Static analysis result for SHA-256 51571d9f61496f4e…

MALICIOUS

PDF

78.7 KB Created: 2021-03-28 22:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8e33c55fdaba1325809b5e9b61c158c4 SHA-1: c8370307c4e822ce60eea85790a24274f1e5e984 SHA-256: 51571d9f61496f4e67b6d41cbd14118cb3d5c1ba46dcc441233845cacf1ed32d
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many pointing to disposable hosting or unknown reputation sites, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic firings strongly suggest the PDF's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://druttle.ru/wix?keyword=nikon+fe+manual+english PDF link annotation
    • https://cdn.sqhk.co/xipepovivik/ibSHxie/crazy_fidget_spinner_guy.pdfIn PDF document text
    • http://libralab.digital/maze_runner_the_death_cure_full_movie_download_in_hindi_720p_blurayadhgv.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/ptiaibp/72455299499.pdfIn PDF document text
    • http://montana-media.com/breakthrough_rapid_readingsg205.pdfIn PDF document text
    • http://sudoniwitexife.22web.org/payment_of_bonus_act_1965_icai.pdfIn PDF document text
    • http://betmoy57.com/fun_english_exercises_for_beginners6w2uf.pdfIn PDF document text
    • http://gevifavilovaz.22web.org/nugidejolalafan.pdfIn PDF document text
    • http://delunabiwefepef.22web.org/80738787584.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/tropic_of_cancer_movie_trailer.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/gaxelos.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/introduction_to_social_psychology.pdfIn PDF document text
    • http://meetsalle.xyz/fokakufofuliguredofamujiw7pum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jekexavax.rf.gd/diguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94679a5-2289-4287-8cef-1e25b7062313/how_to_clean_sunbeam_humidifier_model_sul495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bdeb4ef-988e-42d3-b8b5-b757cbe99328/best_foreign_markets_to_invest_in_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1830da-86e7-4f6d-9083-887459db280d/39268814666.pdfIn PDF document text
    • http://tozapuzigopen.epizy.com/79002459274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334213ea-a5db-4dbc-8ecd-a18432b0ff7c/16246637062.pdfIn PDF document text
    • http://nagikesedogoru.rf.gd/does_netgear_n600_work_with_att.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfcf364-3fa3-4553-bcbb-ddeb2ce56cb3/76450088269.pdfIn PDF document text
    • http://zunedolu.rf.gd/pagij.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_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 5120 bytes
SHA-256: f967d8b396e91840a801ffd64253a77ca5fb02d9c4a66a7f2cae410a6744cd97
font_01_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 12996 bytes
SHA-256: 5adefbe9ebeb18dcec363052c34a886f76232cef3fa34c084dcbda3f2a3120ff

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