Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cd08184ee65c3b…

MALICIOUS

PDF

77.9 KB Created: 2021-04-05 15:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 22fffdb97d8e02a31b33e146c2758420 SHA-1: c99b0982c17164ea6e1388125db541c33ba3a3cc SHA-256: d8cd08184ee65c3bdb57f820ae1fa7bcbecf0d1c56c9dcc8b3fe9d9c1ed55751
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary malicious URL identified is https://gimoguvi.ru/award?keyword=cdf+and+pdf, which is likely used to host a phishing page or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gimoguvi.ru/award?keyword=cdf+and+pdf PDF link annotation
    • http://azorocheat5.xyz/voice_recorder_pro_windows_phone_transferyxhq8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_60630cb8f3d07.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/1bd323092a402.pdfIn PDF document text
    • https://wowobomufib.weebly.com/uploads/1/3/0/8/130874304/gekajeja.pdfIn PDF document text
    • http://complect-tech.ru/457727029072h15s.pdfIn PDF document text
    • https://fefodenajefive.weebly.com/uploads/1/3/1/4/131437461/gulifanipug.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/memivalakaxudemuilkc3.pdfIn PDF document text
    • http://fabulouss.space/tomaso_albinoni_-_adagio_in_g_minor53a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466413/normal_604ae4102a4e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd3a614b4eba.pdfIn PDF document text
    • http://tihefers.online/56021554641irb8.pdfIn PDF document text
    • https://mibajajezek.weebly.com/uploads/1/3/4/0/134017497/b113f75db02.pdfIn PDF document text
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/1cc28d.pdfIn PDF document text
    • http://vovpomnim.ru/actron_cp9125_error_codesxpn1i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_606abded84bb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/834c3cdb-db8f-43c0-a1ad-d1a750f3baee/segokapewuru.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/eaton_roadranger_parts_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/the_heiress_chinese_drama_ep_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/bichhoo_full_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50689b0d-e31f-46c2-b899-f779058cbaa5/descargar_ana_gabriel_huelo_a_soledad.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/scientific_article_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/the_shining_remake_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92F 4184 bytes
SHA-256: de903a8496fe6538d0af7acd1bc8da93621ccb86f2c5c2724ab0108a3015aa3e
font_01_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 11156 bytes
SHA-256: 068f37128018cf26806eb62ba73e508825637d7f3ace670fb369053df20d9626
font_02_sfnt_off00011ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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