Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0dcf0e4ebeca98…

MALICIOUS

PDF

73.8 KB Created: 2021-02-18 11:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad190cf624bf9d1ca6178643d8126410 SHA-1: 0d1ba52d0ea4b1a388818784fd7611b4bd25a43a SHA-256: ca0dcf0e4ebeca984fb48c380dac3b84982f52fed69dd9a11cf3e9f8801fca6f
66 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, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. No scripts were extracted, but the presence of many external links points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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=american+academy+of+environmental+engineers PDF link annotation
    • http://wupofifaxixusi.66ghz.com/besame_sin_miedo_rbd.pdfIn PDF document text
    • http://epipog.com/46475464573o386o.pdfIn PDF document text
    • http://nosinoski.shop/696574574839g3xv.pdfIn PDF document text
    • http://befigter.xyz/formdata_append_file_array_angular0iyzp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_6008c1b32973e.pdfIn PDF document text
    • http://eroganoficial.site/61647210081srt2o.pdfIn PDF document text
    • http://gbo.guru/rufolenokobemugibomubazu997.pdfIn PDF document text
    • http://kataeta.club/50_shades_freed_online4dj5h.pdfIn PDF document text
    • http://100naturals.fun/18473332774t4msk.pdfIn PDF document text
    • http://shopyou.online/gekavusujimir0ovlq.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/story_of_one_piece_so_fardp3s8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_601786d64bbe2.pdfIn PDF document text
    • http://grusha.space/dusuvaletuxajuboz97p2v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizojid.rf.gd/navifawezipibuf.pdfIn PDF document text
    • http://jajowisomipuw.epizy.com/wigifokeromaselewajusuzen.pdfIn PDF document text
    • http://fomabobas.epizy.com/rulekavivapogifiw.pdfIn PDF document text
    • http://kekunulu.epizy.com/6100954082.pdfIn PDF document text
    • http://dizogusuvi.rf.gd/34823672738.pdfIn PDF document text
    • http://kumesebupaxat.epizy.com/speak_now_book_free.pdfIn PDF document text
    • http://lajuloverebob.epizy.com/koi_aap_sa_movie_video.pdfIn PDF document text
    • http://texokobatogu.epizy.com/beyblade_burst_game_psp.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_off0000e1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A5 5492 bytes
SHA-256: 6771a6c0dce928b8fac3d9392411837f03bdd1b0138b2ccd63ff3c1530a54a06
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10924 bytes
SHA-256: febd5d7c53eb9b1cb926ded7307ea3471f7614a4a794951d31e1bd6cee677870

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