Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cb76c04d951b62…

MALICIOUS

PDF

45.6 KB Created: 2020-11-06 22:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 9d64038f3f87cc93a3a9621e0f38811b SHA-1: 6293e7765f89745ab01566b38e8fac693dab2be0 SHA-256: a5cb76c04d951b6286d6590fc9ad8cc26749b4df0e6dbacfea6db2c240911de6
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffe.ru/aws?keyword=types+of+pinches PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f99f55248b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f9b49cb4194f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f877df933f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8a004eaa6ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f93c75d1680a.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/835172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_5f9f7ea2bb529.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/2bf7bdec-29c3-423a-af77-115e7ec07fa1/kolazixapizazuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b6af9a-ce73-448c-aada-2833e73f1151/best_torrent_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c0a9ab-dbe1-4830-8a0b-afa026b9c3b4/8225470901.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/tafezimimaxike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877320aa-6e61-40f2-b3e8-f34df9c41681/frank_ocean_channel_orange_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5049917-3f51-4b33-9aaf-e78fcefa317a/39433501759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3f6c4e-74a8-4caf-8685-61f1dd52360c/reality_through_the_arts_8th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97751dbc-dc09-4496-a3ed-cc3cb129b9b2/riddle_transfer_1_unblocked_games_66.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/google_sites_calendar.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_off00007408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7408 4816 bytes
SHA-256: ab4d6709e4479857a6026bd0bbd1a7cdac2f489fd294de4b29ecadb75f8b346c
font_01_sfnt_off0000847f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 11204 bytes
SHA-256: 66a3fe6a7cb95f274e799b5b9a27a0d6b73bbf52b9f077ddccf33a606a6673c3