Malicious PDF — malware analysis report

Static analysis result for SHA-256 56da44bae1a62f46…

MALICIOUS

PDF

129.6 KB Created: 2021-02-26 00:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a355ec715d15560ab5057ce5d03400cc SHA-1: 39fb87aaf201cdf3d5d2e2a338b6046ca9d5583f SHA-256: 56da44bae1a62f46a2d0f340fc28dcbc4289f5918574d58a51e10bbf99113d2c
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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/award?keyword=what+year+does+metal+gear+solid+take+place PDF link annotation
    • http://zufuruz.22web.org/what_do_umbrellas_symbolize.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/2020_starcraft_autumn_ridge_32bhs_specs.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/acer_aspire_e5-571_specifications.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/eyelash_extension_course_jacksonville_fl.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/las_batallas_en_el_desierto_novela_completa.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/egdjcN6/wokesapipozedudotedor.pdfIn PDF document text
    • http://rosovutuwonemis.iblogger.org/followers_booster_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/fhevQ1z/84390019208.pdfIn PDF document text
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/3a3a9f7.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/hjgohfU/free_download_block_craft_3d_mod_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/kxIjjgg/forgotten_hill_tale_little_cabin_in_the_woods.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://volarudene.epizy.com/math_workbook_grade_9.pdfIn PDF document text
    • http://fikojadepo.rf.gd/77977464498.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/c.s._lewis_mere_christianity.pdfIn 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_off0001c0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0CA 17072 bytes
SHA-256: 39423fc228e3128643823805abecb4be0529a629b4d4f1546d3a2bb4368b3c1f
font_01_sfnt_off0001f7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7C6 5668 bytes
SHA-256: eb6253f09b9bdc7966b0e924cf7d869af60f5cb1e9945c4c047578760657a233

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