Malicious PDF — malware analysis report

Static analysis result for SHA-256 530cf30a49a27f46…

MALICIOUS

PDF

40.6 KB Created: 2020-11-04 02:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 98232628274b99c4d16b2364dbc6bdba SHA-1: 875bdeee989dcd961f4e03dd33a52a85eff92ea2 SHA-256: 530cf30a49a27f4612a3c387841daed9a8c5d4ae9c48115925195b1e187e8ad8
202 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector URL associated with malicious activity. The document body also contains the same redirector URL, suggesting it's the primary mechanism for luring users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/aws?keyword=seatgeek+tickets+not+showing+up In PDF document text
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/3333378.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/dekefomivupe-kovak-talajonipa-fedebiraroz.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/23c387de-9387-41c6-88d8-dc723310a2f4/73767880289.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/ligumimakesusibemabofetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e504556-60ca-4f36-b255-dd96e1eab537/magical_girl_ore_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/fafogadutitawimogate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88148ea2-43a7-43e1-b7f9-a3213fb252b1/77299236415.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/what_is_basic_unit_of_length.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37426cd1-0d12-4be8-9990-331a571f043f/pazesav.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/joints_and_body_movements_review_sheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/mamefejiredafiluguwenon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50782fbf-4df1-4a6f-94fb-f7a654a333f5/bajrangi_bhaijaan_all_song_pagalworld._io.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/dowawodomuvopif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89883eac-5581-43c8-98f4-b916e1d73f37/laura_berk_development_through_the_l.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/gafetesivopefijapuvi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 5328 bytes
SHA-256: 707b357a7d3d878058e9d3c1d9a8ca8a7c5ca6587522ecfe0e1b45b131fd2fae
font_01_sfnt_off000071fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FD 10448 bytes
SHA-256: ab5747bc1e508602aeab37a5b503f5f19eaa29584d251c33cfce440665812f31

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