Malicious PDF — malware analysis report

Static analysis result for SHA-256 762e1aadb468750a…

MALICIOUS

PDF

84.7 KB Created: 2021-03-29 11:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ffd63f7a4a6f95e0c46fcd74dead3ee2 SHA-1: df30b1e4ff6dd53e7d1f79563a86d04ae318cab4 SHA-256: 762e1aadb468750a19f45a9910a285f1869f08869d81cb92792d8e137c46405b
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains an embedded URI and a high-severity heuristic indicating an image lure linking to an SEO redirector, which is a common phishing tactic. The primary IOC is the redirector URL, which likely leads to a further malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=6.0+powerstroke+horsepower+recipes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475739/normal_5fc800977fbfe.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/video_killed_the_radio_star_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6019105db8192.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/las_chicas_de_alambre_todos_los_personajes.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/hFgcCic/nowepuvon.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/fusionner_plusieurs_fichiers_dans_un_mme_gratuit.pdfIn PDF document text
    • https://cdn.sqhk.co/lufezeralon/Ojgefnt/virtana_virtual_instruments.pdfIn PDF document text
    • http://memaviwebepa.22web.org/58207253284.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/muvatoboposezibomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453540/normal_604cc226141a0.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://s3.amazonaws.com/dogevazapiwediw/how_to_calculate_manufacturing_cycle_efficiency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3fa8a6-2b60-48db-836e-5dbf39c542df/taylor_ice_cream_machine_manual_c723.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/27765074186.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/jezamagojutelo.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/how_to_train_your_dragon_book_4.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/calligraphy_font_style.pdfIn PDF document text
    • http://vutaxinasiva.epizy.com/munimejon.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/kasomuxixafuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900c5be2-069c-4353-8686-7dd90fc915a0/attack_on_titan_manga_ending_soon.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_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 4852 bytes
SHA-256: 0dc46953a9fb847c00cca2ea6db9dae40a508cd031fa7c5e2942ff519e6999c8
font_01_sfnt_off0001116f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116F 11076 bytes
SHA-256: 097e94ff3209400e4622a016eba463b0ba098db9b90491e4ecdff2134114d1ce
font_02_sfnt_off0001372a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361