Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8b293920a51e30…

MALICIOUS

PDF

70.2 KB Created: 2021-06-07 17:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82cdd6850d4462e4ffcc60ae6b58dd2c SHA-1: ae30d2cdc7d3fadcef82d3bb935b5fec22f6aef8 SHA-256: ae8b293920a51e30dd32ebef6f6b09f2084ca8b0e68ab05777b8682032a98643
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/pbw?utm_term=pentagon+shape+are+all+sides+equal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493541/normal_60b8151549898.pdfIn PDF document text
    • https://nuxinipimop.weebly.com/uploads/1/3/2/6/132682773/lerixabemo.pdfIn PDF document text
    • https://sazaburesifug.weebly.com/uploads/1/3/4/2/134265765/dapulazi_tiwune_zuxapeluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_600c53f534269.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4406454/normal_60b3237bc7c74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5ff610a3af500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_6024c9155c3f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_60bd0ec38ed68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_6014a466dd081.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/e193d255-fd8c-4036-b91d-1dcbbafd48e3/biblia_de_estudio_de_la_vida_plena_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec20aa2-5ea9-452d-9e5b-61aeaefc754e/can_you_get_cosmetic_surgery_if_you_have_high_blood_pressure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544a07bf-4223-46ab-be23-b808faa46782/dragons_of_autumn_twilight_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b775ae10-5bfa-4a03-9bc0-d1766ce77b81/water_normal_map_shadertoy.pdfIn PDF document text
    • http://ronefete.pbworks.com/f/what_is_the_difference_between_interpretivism_and_positivism.pdfIn PDF document text
    • http://goferupemo.pbworks.com/w/file/fetch/144582381/how_often_should_i_service_my_mini_cooper.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_off0000d45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45F 5348 bytes
SHA-256: 96ec11ac21b9efe03fb75b698c334f4ac7e3ce479edf5da73047daa77a56d53f
font_01_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 11008 bytes
SHA-256: 0525aa5d503f1caf6abc1dd541b1c5573eedbba307d008b2e6cc8f90e92b9383

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