Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48251657c47ba6a…

MALICIOUS

PDF

80.8 KB Created: 2020-11-19 20:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 234988eaab2a77634644600a178740a5 SHA-1: c6ae7570ccad6631ee8d22a625a2787b2fff864b SHA-256: e48251657c47ba6a9c5272590cf6218fbe79b63cfb51830b550d63c7c7279de7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users. The presence of external URIs and the 'link farm' heuristic indicate an attempt to direct users to potentially harmful content, likely for phishing 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
  • 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://trafftec.ru/123?utm_term=pokemon+x+emulator+android PDF link annotation
    • https://bugemimeme.weebly.com/uploads/1/3/4/4/134403979/2254493.pdfIn PDF document text
    • https://mefopati.weebly.com/uploads/1/3/4/8/134866381/linozoxukawuzun_binoferakik_nikanunulu.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/5948879.pdfIn PDF document text
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/ruwasoguru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5fb03d4ab435a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5fa9664889016.pdfIn PDF document text
    • https://pujosudenavi.weebly.com/uploads/1/3/4/5/134508056/9d1903e09f99.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/vonuk_regaze_kanozorerunega_nuveguwazev.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/jimeferavani.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/biwuwukesazef/infectonator_2_unblocked_games_66.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/free_pregnancy_horoscope_prediction.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/whatsapp_apk_downloading.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/80251548701.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/bio_data_form_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a718b12c-e1a7-432f-acb2-53f05dbf2d99/63982935331.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54D 4924 bytes
SHA-256: d9e510dde19b427c3521e403e688b47d7746c650cadf601207108c6ae6ff8a7d
font_01_sfnt_off0000f5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FC 12740 bytes
SHA-256: 56d8016097841fe0927caed747b9d7dfbd0e665e3f47a230d6a7f89c32da65d7
font_02_sfnt_off00012044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12044 16448 bytes
SHA-256: eec8f53ea78c150f1f77c382161ee8ba4c17de9628ee087e018b94d963dff0f7

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