Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6006c4b23d44ae…

MALICIOUS

PDF

80.0 KB Created: 2021-03-20 15:30:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 710e282c4f37ded75ffa59f1b50d7db5 SHA-1: dd4eec2056d26e71c9ceacb645054690dd1f57ac SHA-256: cd6006c4b23d44ae2a6911f02e4e1548cacec3a071d39efa94966ed184004de9
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 is a phishing lure, specifically using an image to redirect users to a download link for 'Gta 5 apk android original'. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into downloading potentially harmful software.

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://jottigo.ru/wix?keyword=gta+5+apk+android+original PDF link annotation
    • http://rabevazilogu.iblogger.org/96492338641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ff09aba89ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_6048c26ea9499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_60415153935aa.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/aTGcfDF/21238202195.pdfIn PDF document text
    • https://cdn.sqhk.co/sononipo/idhdOja/steam_consumption_calculator_online.pdfIn PDF document text
    • http://jodujimapiwox.22web.org/14079786484.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/jaZWw9U/barcelona_events_2019_october.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/0e91e4ec-4efc-4dbc-a47e-a58a501b73b1/9594710695.pdfIn PDF document text
    • http://vitusaw.rf.gd/christmas_hymns_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a43fac-7cfa-4079-a6fc-2812ff00c15c/xerox_workcentre_7845_driver_win_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9292e697-6ee3-4458-b1b5-5ab188cc6914/short_best_friend_quotes_copy_and_paste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1389b413-e452-44ff-ae4c-3b9405c81060/54127384639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5c4b71-ff0f-4e70-8bd7-914b5df765ba/winelidodexonusakowesofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0d082b-3b1d-46ae-b51d-888418d62af3/32763560995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cec652-ff81-43e9-96b7-6732921a1d73/ximerotifazolekukoxev.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_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 5168 bytes
SHA-256: 7e584d6eeecac3a52badcf3dd5ac82d5e2253934b44994132bb653f4979cfe53
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 11360 bytes
SHA-256: 548fbd8f5db6ee1bf74900a4f79dee035350e8083c9c3a9cb4417447c44ad0bd

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