Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa754c1200d13df…

MALICIOUS

PDF

94.7 KB Created: 2021-03-09 22:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 763a83368e4bd956807f5a368c5b407e SHA-1: ca7b7658496835e509f75694cf0281ffa09ef382 SHA-256: faa754c1200d13dfea71e26958ddba0b5b0f92f5b329ddc4ee1a7010c975baaf
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect to a URL that claims to offer a worksheet related to the electoral process. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=the+electoral+process+worksheet+key PDF link annotation
    • https://cdn.sqhk.co/bidekidarub/gd03mjf/olympic_bike_track_racing.pdfIn PDF document text
    • http://ca-manalapan.space/the_island_castaway_lost_world_chapter_6_walkthroughi1y4a.pdfIn PDF document text
    • http://minuette.me/why_is_my_frigidaire_portable_ice_maker_not_workinggqcl8.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/7LgeHfl/64739998560.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/aySc8Hn/deer_hunter_classic_for_pc.pdfIn PDF document text
    • http://tikovg.xyz/92710044104o3gqd.pdfIn PDF document text
    • http://helpcopyright-service.com/juego_oz_broken_kingdom_apkjdzfj.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/ba7e5e21-e3f6-41a6-a35a-5411ae417402/utilitech_sump_pump_1_2_hp.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/25192572988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17563b6a-7d94-45f7-ac76-3e6d8b1db9f1/jvc_kd-x351bt_wiring_harness.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/wojaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fb9353-b039-4827-b9d7-de700bf6cd16/14702957378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be899db-2c4e-43e9-9b76-0c5b97ec2a40/troy_bilt_mower_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/47772880772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644b057c-5422-4d20-97fc-42fdbc9031d8/face_model_3d_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aacbf84-7b49-44e9-a00d-46a3b7f6e08f/american_gods_cast_season_1_episode_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077e30de-f9ff-4c57-b1bc-3511ea4d3eb4/tomovuxemudamininezada.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_off00012ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA1 1644 bytes
SHA-256: b740fb5772f30033a20b64cac589e5f3d4272b57f5e72ea652a39b6fd94a8056
font_01_sfnt_off000134d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D7 5228 bytes
SHA-256: ff98b469bde97ccbf23df11fa68d4127abb45471e70315e8030dcee9a0f002a5
font_02_sfnt_off000146af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AF 11244 bytes
SHA-256: 5fb0dbda0f702d760739ee0a0ebf95ea858f2028c4d20c52d693a504300b7d94

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