Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd6d91abf35d0c1…

MALICIOUS

PDF

46.4 KB Created: 2020-10-26 14:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5011e09b1d6f14460d6d4f8117dcefe1 SHA-1: 27c944e0d8d6ccb541917db33a7aaa1a849499c9 SHA-256: dfd6d91abf35d0c1293d08b72fd7995b99ba24c7de0733b46c34c38515af868f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=section+10%252814%2529+of+income+tax+act+pdf In PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/3635439.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/ganoxumul-nufubawadolifi-zawabidi.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/xawop_mavogejo_luger.pdfIn PDF document text
    • https://gozekukapitob.weebly.com/uploads/1/3/4/4/134443516/327e4baf79a4fd4.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/govenuburobed_lividiguwusorik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/memul/modul_praktikum_biologi_sma.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/sociologija_knjiga.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/delapagunomubujamabawo.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/51433939191.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jopav.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/supexuwowozek.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/71986080547.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/neurofibromatosis_type_2_diagnostic_criteria.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/bncc_ensino_fundamental_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/viewer--_toolbar_title_change.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/tuvovanotu.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/49585539337.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/61221147545.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/viniwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7f7488-f390-4e74-aacc-79df21eff7f0/25321790454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be594e10-535a-4518-9bcb-927b75e3b3f2/maths_tout_terrain_cp.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_off00006831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6831 5392 bytes
SHA-256: 5e8df1391e1f490cfe28be5736787e5c3e6ad64ed8e4df346a158a427d5190af
font_01_sfnt_off00007a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A86 10448 bytes
SHA-256: 06be63b32477c3cf7efb13046c50ec3b6414140d363293a7ccdbd06dd53829e4
font_02_sfnt_off00009e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E2F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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