Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa87dd3128ceff3…

MALICIOUS

PDF

82.7 KB Created: 2021-02-26 07:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a97b92382d5f33efcd1a42bab7baf3bc SHA-1: 90511c2974638489f07c5393489a0ce0b9e5f933 SHA-256: dfa87dd3128ceff362b9aac2919808badb75c7290d287d2bce7a9e3ab176793b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it uses an image lure related to car navigation systems to redirect users to a URL, likely for phishing or to download further malicious content. The embedded URL points to a domain associated with such lures.

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://seumenha.ru/123?utm_term=does+2017+camry+se+have+navigation PDF link annotation
    • http://wotukujis.sportsontheweb.net/dd_3.5_e_monsters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6012900d859ec.pdfIn PDF document text
    • http://triple-doska5.club/beauty_room_rental_contract_template_ukg5ed7.pdfIn PDF document text
    • http://mobile-media.moscow/what_was_the_role_of_the_us_in_latin_america_is_mexicobut6y.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/ed262a2162.pdfIn PDF document text
    • http://detonic-italia.website/26061577011xde6y.pdfIn PDF document text
    • http://cryogen.me/kegijunubumenb785w.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/gabaviwo_fabokog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5fd3dba390413.pdfIn PDF document text
    • http://sadovik.me/christian_baby_names_with_meaning_downloadnj3n5.pdfIn PDF document text
    • http://afracheat8.xyz/germany_bundesliga_table_fixture_formhxdpa.pdfIn PDF document text
    • http://allieshouseofhope.com/mumuxinulufirugobaleluwafpm4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473637/normal_601cbac9b8fd7.pdfIn PDF document text
    • http://m-laskin.ru/30904816861eppgb.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/waxapoz/14554048301.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/what_is_the_judiciary_system_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/retewupoxapedumiw.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/17990785660.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/65815177714.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_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 5536 bytes
SHA-256: 850ee06e01b0569bebe609bb79e7876f6d8c77a5e2751c8516d838708523129a
font_01_sfnt_off00010aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 10596 bytes
SHA-256: 69037fce5240e7334292aa66d28069097957e48a9a0d3ae508e33f7e38ba406a
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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