Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9aeb1e13658e604…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 13:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6dc2cb1732be8f3d571b5f1ef4e53132 SHA-1: e4b57116871f9dc9bc83be8adcf2c3b761409556 SHA-256: d9aeb1e13658e604f45f12f775e7e3f77738bc4801d0825723afe64658bf8284
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and potentially malicious content, suggesting it's designed to lure users to external sites. The presence of external URIs and the link farm heuristic strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://zajinet.ru/award?keyword=the+anti+inflammatory+diet+action+plans+pdf PDF link annotation
    • http://bimovixexena.scienceontheweb.net/arabiyyah_bayna_yadayk_book_4.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/cASFcBK/history_channel_vikings_season_7.pdfIn PDF document text
    • http://nositadox.mypressonline.com/bible_study_outlines.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/firolix.pdfIn PDF document text
    • http://nonoxutiwi.mypressonline.com/pakawozexegifitifufabu.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/inniaXO/liduselujezasuvame.pdfIn PDF document text
    • https://cdn.sqhk.co/zomujugoke/jqlvqfn/wecroak_app_android.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/cancrum_oris.pdfIn PDF document text
    • https://jabapimodixo.weebly.com/uploads/1/3/5/3/135314731/xebinezoxi.pdfIn PDF document text
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/reropafa.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/doxolanibagotudime.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jolebanarivife.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/2039461.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/jgpGjgR/84287988732.pdfIn PDF document text
    • https://cdn.sqhk.co/busudijul/i0bdlDA/67485588670.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/divogupesotebafazamete.pdfIn PDF document text
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/d679b4a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1cf478-c272-4355-b186-da52b2f8cf05/supply_chain_management_trainee_jobs_in_karachi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bcb3c0-6d93-4497-ac88-b2c79884558d/87895135286.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/2012_mercedes_c350_coupe_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/362596227.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/63460522828.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/73999923505.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/55918147214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ade891-fb54-4158-80ed-c024e47028fe/94932768510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1282c306-a685-4ca6-8657-058801bdf8fe/samsung_series_7_smart_tv_user_manual.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_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 5444 bytes
SHA-256: dcb114199f3c9fa68eaab337ff8bbb7cab38e4518cace8757ebfe2618e76a2a5
font_01_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 10396 bytes
SHA-256: c5cce66227de6869ce2181486eb6e301b65da868e64846e12fa566b00f44b6ba