Malicious PDF — malware analysis report

Static analysis result for SHA-256 692fc82c047a6f4f…

MALICIOUS

PDF

68.9 KB Created: 2021-02-28 04:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 461ab603808dcee01a919eb73286eafc SHA-1: 9429cf6c817ec64b3887c88a54d1ba8e99f0f95d SHA-256: 692fc82c047a6f4f654991c87d4782695574bf1682691779e7adace0960d9a1e
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using a 'fifty shades of grey book quotes' theme to entice users. It redirects to a suspicious URL, `https://dugedepap.ru/123?utm_term=fifty+shades+of+grey+book+quotes`, which is flagged as an SEO redirector for free-download phishing. ClamAV detection confirms this as `Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0`, strongly suggesting a malicious intent to deceive users.

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://dugedepap.ru/123?utm_term=fifty+shades+of+grey+book+quotes PDF link annotation
    • http://xusolupofedowi.iblogger.org/weight_machine_scanner_app.pdfIn PDF document text
    • http://vadinesejel.22web.org/victorian_language_of_flowers_translate_to_english.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/lugitonoxetez35zth.pdfIn PDF document text
    • http://legendbilisim.com/719430497438qyyu.pdfIn PDF document text
    • http://save50it.info/attack_on_titan_season_3_ending_song_downloadlinvh.pdfIn PDF document text
    • http://summerita.fun/38105382443ndkjc.pdfIn PDF document text
    • http://podeves.xyz/what_are_the_steps_of_artificial_inseminationkx367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/corporate_overview_presentation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/jikawiweturilirudarazuvoj.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/vomogemiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/pinutodojid.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/40344598198.pdfIn PDF document text
    • http://fozagagubimamow.epizy.com/kenmore_70_series_dryer_heating_element_home_depot.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE6 5524 bytes
SHA-256: f25a47bda03c3c11bf1006a17580f49d9dc52f11d54f78a1b0636c7dd89e9583
font_01_sfnt_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 10272 bytes
SHA-256: 60d8c47723edd7c85f9d03c1ab5296f0943cbc91e782370f44829f70168ff7e3
font_02_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073