Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0aba6afae514e5…

MALICIOUS

PDF

75.5 KB Created: 2021-02-21 13:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1783d4566b84bbce9536f3862d78e3f7 SHA-1: fd6a3e14cb6f633e417ae2181bdcb5ad8298d4c0 SHA-256: fa0aba6afae514e5bb17c988da659d35a519e68f0c62c763ae9ec3c6f9ec3935
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior. While no scripts were extracted, the presence of external links and the overall structure suggest a phishing or malware distribution attempt.

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://maypoin.ru/strik?utm_term=hindi+alphabet+chart+pdf+download PDF link annotation
    • http://virutimi.22web.org/53623625343.pdfIn PDF document text
    • http://zibukebolavor.22web.org/20752636773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_600ebb6766e17.pdfIn PDF document text
    • http://wagugekewa.22web.org/saxazubajig.pdfIn PDF document text
    • http://wesaremujoworu.22web.org/handbell_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_6006f06e2cb26.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/f25361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5fea137a7ffbd.pdfIn PDF document text
    • http://xenifizonuk.22web.org/58224036787.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/dadini.pdfIn PDF document text
    • https://zesalogerevuj.weebly.com/uploads/1/3/4/6/134684883/3745426.pdfIn PDF document text
    • http://loletopuwiv.iblogger.org/adobe_acrobat_reader_2017_mui.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_60192c08d1163.pdfIn PDF document text
    • http://togurebuk.66ghz.com/81622806391.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/ee88acd1d3269a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuzonulegi.rf.gd/babul_shooter_game_free_apk.pdfIn PDF document text
    • http://banumekopi.epizy.com/zogevorutujebenot.pdfIn PDF document text
    • http://biborufa.epizy.com/metro_map_delhi_2018.pdfIn PDF document text
    • http://dekifovep.epizy.com/75514315496.pdfIn PDF document text
    • http://guruwemuzotal.epizy.com/83462135942.pdfIn PDF document text
    • http://gateguka.epizy.com/wagomidopapizawazofeti.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_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 5260 bytes
SHA-256: abedb5d649d1d0d4d1ea8810d89aaac7dc3efc6a9e874b435e43a62c3d12e6bd
font_01_sfnt_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 9880 bytes
SHA-256: 5079e85c6c7ff9a89c7f5ac5c368d5d9531b74ea1952878726389a99f315de85
font_02_sfnt_off00010aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEF 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1

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