Malicious PDF — malware analysis report

Static analysis result for SHA-256 71432179015997d6…

MALICIOUS

PDF

83.7 KB Created: 2021-01-06 19:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 597608d473e1e0b087ef9e500157e721 SHA-1: 40c8b26f76743a91db7cd2becf39973ae863dd8d SHA-256: 71432179015997d6334318d36fee72262e1bc8ccd634171c5537c7c90748cac8
136 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a lure related to 'Netacad ccna 2 chapter 2 answers' and embeds a link that redirects to a suspicious URL, likely for phishing or malware distribution. The PDF structure and embedded content suggest an attempt to exploit user curiosity for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=netacad+ccna+2+chapter+2+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5fc301099e0e4.pdfIn PDF document text
    • https://cdn.sqhk.co/govovazeket/tngcgfS/black_desert_online_crafting_tools.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/ajbjejj/best_hashtags_for_youtube_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/152553ee-91af-4198-bd1c-040333115864/everquest_enchanter_gear_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/58661187889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f39673-5d1c-4376-aa55-162188951adf/vivovebejonigorufote.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/2020-211999_is_true.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/new_android_tv_apps_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4864f153-6a5b-4631-8ff5-53a17d89df60/physical_science_worksheet_conservation_of_energy_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c82e7b-f0f1-47bd-8007-d08db44099e5/amazing_grace_song_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7a10fe-8416-4a6b-847b-60ef5c6cb350/gafoxetotosod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c59524-8f20-4807-bdec-e6b78a42abea/sogopepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b537e7c-6fef-493d-ad50-0a95e59d7af3/litcharts_their_eyes_were_watching_god_chapter_9.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/netflix_limit_per_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce95f6e9-5681-4a85-a3e1-dcfff0515866/vaxitatiwiruparaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85c89c2-f281-42a0-a1b1-266f01803c5e/99302776119.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 5320 bytes
SHA-256: 82f0d00c9e22fa470c580e04824d75f7a0bda5cde04ad0b264f869a9a15b9846
font_01_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000104e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 10436 bytes
SHA-256: 03710abe8a4fb22ce63f3a43754533502b070b2238661b52d2637cf17e4ce9c9
font_03_sfnt_off000128c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C8 6968 bytes
SHA-256: 5fe99e2610953b273ce687a7786d05b6d0482e7201c95c6c8efdcea63c038c95