Malicious PDF — malware analysis report

Static analysis result for SHA-256 9417f23615462aed…

MALICIOUS

PDF

81.6 KB Created: 2021-04-06 00:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718ae1511e54a0663ee19eeb2eb6cf04 SHA-1: 1e54f8a1d5297c35a8ecc43318b4d19696bc9a27 SHA-256: 9417f23615462aed6ebbabf8961dd01f3b7cb484db6827672831717b8da9e097
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains a large number of embedded URLs, many pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://seumenha.ru/strik?utm_term=are+you+allowed+tattoos+in+the+navy
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/livul-ledupov-mixovetuw.pdf
    • http://ninuwekevap.scienceontheweb.net/forgotten_realms_books_order_read.pdf
    • http://vofigasu.medianewsonline.com/fisicoquimica_gilbert_castellan.pdf
    • https://rababavuve.weebly.com/uploads/1/3/1/8/131871532/buroxo.pdf
    • http://takavejesutep.iblogger.org/rejukezokibirolowijirumak.pdf
    • http://fapumew.22web.org/pemugoxov.pdf
    • http://wapadax.scienceontheweb.net/risedibulibezepetifeto.pdf
    • https://wobapuzufisuro.weebly.com/uploads/1/3/4/0/134042344/d8912b862df.pdf
    • https://cdn.sqhk.co/sisamide/WsuAigd/polofi.pdf
    • https://cdn.sqhk.co/dukizukijire/cKF0WRw/.pdf
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdf
    • https://vijopafixav.weebly.com/uploads/1/3/1/6/131636601/244c6879a1c7de.pdf
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/1359676.pdf
    • http://tuvoreda.scienceontheweb.net/therme_vals_zumthor.pdf
    • https://cdn.sqhk.co/nowonipewo/Bwjj2ia/budget_performance_cars_uk.pdf
    • http://serovakarara.mygamesonline.org/1999103067.pdf
    • https://cdn.sqhk.co/xexisini/ojbgegd/small_business_plan_outline_examples.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dejazuvorira/bissell_proheat_2x_revolution_pet_carpet_cleaner_parts.pdf
    • https://s3.amazonaws.com/gonafoziguwewe/bams_am_full_form.pdf
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_ea5eb28fc0834b5db097f2d10664e1d8.pdf?index=true
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_dcab102918b547d4a2e2efdf399baf64.pdf?index=true
    • https://s3.amazonaws.com/novipaliwid/erode_district_map.pdf
    • http://jisokewiw.epizy.com/panasonic_genius_prestige_microwave_unlock.pdf
    • https://s3.amazonaws.com/liguwubore/38748584187.pdf
    • http://jedabotuz.epizy.com/19242442549.pdf
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_08eb8590713849bcb2cabbe9cdad61d5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001024f.bin
e2b118de0df1b39da864b1662651e82ea6d07a74d889140f85e8013eaffe6990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 5156 bytes
font_01_sfnt_off000113ed.bin
fb5db4461b39e422a97371eb1170b263aadfff7b41b08f1f785d2dd76479f6b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 10808 bytes

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