Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49bcf9a43c81b7c…

MALICIOUS

PDF

35.4 KB Created: 2020-10-07 13:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4788e90eb5aaea5d68c461ededbd3210 SHA-1: d40dd36d3aac52c6aa7a9b5876cb6a934a6ebe51 SHA-256: e49bcf9a43c81b7c0a741ad61fd55e89946c42d73fab6625c1d412c295fa50e3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://ttraff.club/pify?keyword=21st+century+astronomy+5th+edition+pdf+free In PDF document text
    • http://files.shelleyartgroup.com/uploads/1/3/1/8/131872238/kokozizetovitovaxu.pdfIn PDF document text
    • http://soxeb.partnersinrelief.com/uploads/1/3/0/7/130776277/755032.pdfIn PDF document text
    • http://debog.zeeamerphoto.com/uploads/1/3/1/8/131856456/5300313.pdfIn PDF document text
    • http://files.victoryjiujitsu.com/uploads/1/3/2/6/132683142/tewijijamifuna_mewenukos_deminudedi_nobifitetala.pdfIn PDF document text
    • http://files.movemakersphilly.com/uploads/1/3/1/4/131453698/lujawozim.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/ee5c5a1c-363f-44d7-a73c-183ef21e6c3b/kifawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc76fd7a-36ee-4990-b801-5f39494ac605/1563719068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d7cb26-bd0a-4293-92de-8e675b006807/34026111009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c6113c-0d79-49b1-bd3e-4d08bf04fd84/rexejumukexuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2703ea-9856-4d08-a6a3-0e9059c88caf/83779100871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6758/0831/files/beverly_hillbillies_theme_song_lyrics_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3534/9151/files/stick_control_download_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a0b211-10ff-4c2a-9f83-31d395fd4063/peraketonera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06dc2bc2-b05e-482b-b2d6-5a5ee43db481/74662802953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce0be19-7bd8-4395-877c-f00d0a694a12/65047777968.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_off00004ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE6 5680 bytes
SHA-256: 51843de8a197a01a89467b1a3ee04ed308ffaffa3859b57a5f877a05b6f83516
font_01_sfnt_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 9560 bytes
SHA-256: a0b3bde498fa0a2fe64473fb64ac226c39a1e857a012a844162fc2baa9b0160c

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