Malicious PDF — malware analysis report

Static analysis result for SHA-256 189f0aec7dd08631…

MALICIOUS

PDF

69.1 KB Created: 2021-04-24 22:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 14a2c0805c7bee8e4d6558cef14e2159 SHA-1: c431b0bb6f4ac0eedf97b21a5d1d24e1b9c357b2 SHA-256: 189f0aec7dd086319956e0a9b301f4010703537c2eeda688061a2d7a404613d8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to citation styles and PDF generation tools, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=how+to+cite+online+article+apa+style PDF link annotation
    • http://porn77.design/disposiciones_legales_acerca_de_la_obligatoriedad_de_la_contabilidadxr6v7.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilogifuxe/cji9Dxd/colors_of_the_wind_chords_vanessa_williams.pdfIn PDF document text
    • http://firstsecu-paypal.com/58714180263f3ima.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/chblXyg/ginger_grammar_checker_free_full_version.pdfIn PDF document text
    • https://zumaboletafu.weebly.com/uploads/1/3/1/4/131454272/4b19997b8c987f.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/UjeeP2L/geotourist_app_store.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/a6ac4d261bb743b.pdfIn PDF document text
    • http://copyrightsupport-ig.com/what_is_caps_for_sale_aboutps96o.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/aicWWR8/off_road_pickup_truck_r_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zazezinokigane.epizy.com/19621820166.pdfIn PDF document text
    • http://lofadezowudekeg.epizy.com/halftime_report_anchors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/910a8414-04b6-408c-a234-2b0eed701765/dakixunexoridamu.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/kunow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915f669d-b270-4eb0-bc62-0a6f7b5f3145/solutions_by_great_clips_violet_shampoo_reviews.pdfIn PDF document text
    • http://vusejukulerubip.rf.gd/93133324641.pdfIn PDF document text
    • http://manovubiludigi.rf.gd/saputofalowol.pdfIn PDF document text
    • http://nexuxawire.epizy.com/paulo_coelho_hippie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23df2413-caa5-4753-bcd5-6c9851143f46/unit_conversion_problems.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_off0000d359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD359 5084 bytes
SHA-256: e2bb25d130e4e4eb9a0efbf595160b51322f90de39505cea442497ee10224cb7
font_01_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 10088 bytes
SHA-256: a9f56c4f34d38759b20df9e33e400840364c5e65ccd57efbced1d13120efe6af

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