Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d18ebe7afffc5a…

MALICIOUS

PDF

120.5 KB Created: 2021-04-12 23:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8c7653f5fe9337a633da876c8945d398 SHA-1: 6e6f3803cafa0c570d75c25ccbb0a237c0eea358 SHA-256: e8d18ebe7afffc5a016f9aaa987aa8c647b42555f373e99d0a14b5c98286826e
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to making money. The presence of multiple links on disposable hosting further supports a phishing or scamming intent. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=el+arte+de+hacer+dinero+resumen In PDF document text
    • https://cdn-cms.f-static.net/uploads/4493890/normal_6029d4fbd2fdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_5fd30ec10470d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5ffed44c5246a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_6007ccefd3876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495042/normal_5ff88e6bd14dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_606e7cdfaa3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_60334482ddb10.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/918e4b7b-5bee-4de8-a3e2-420880701784/ipad_mini_5th_generation_resolution.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_b80f382cb6164f6cb44fa88e325e09b4.pdf?index=trueIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_3734a4c7e1b346189f06a54c627cb56c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numunenoji/five_nights_at_freddys_survival_logbook_free.pdfIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_81d2f743f5aa428a81bd112bf4bc9bc8.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_b5fb2bf2bd0a4dff82fa179c634e3284.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/batallas_en_el_desierto_personajes_principales_y_secundarios.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_0299db04610c48bc83ce04d1c52aaa3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/11692350298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6364dd9d-9ae0-4b24-91e1-6a82c1e0f1e1/jirit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1943969c-6562-4a51-9d69-d187b45d1ad1/duwiwozagefijotumisenif.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/como_disear_un_taller_de_aprendizaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fd6b5d-6f06-4169-81e7-59ccb8274d74/gonunaniwizuburuxobazab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a144cac8-2763-49ce-a16c-fcd111cad214/89344897569.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_183eb8334fc7463580b919813b7e0cac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/chronicles_of_darkness_dice_roller.pdfIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_c60fc2e1e2874a72aad038d553c7daa7.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C03 2856 bytes
SHA-256: 22627560172e1a9a76f328b5710b94d7d30c52cf97484912ac285288bd531415
font_01_sfnt_off00016628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16628 1528 bytes
SHA-256: ed92cafd901dd1cf1e35098023afc6358b03ff7238836c92b52e0ef4a2243c99
font_02_sfnt_off00016df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF0 5136 bytes
SHA-256: 6d4a6e61daefcc34f475d01eb9fe1c69aa024ea5062c7c83c3282d2b2408488f
font_03_sfnt_off00017f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F34 4816 bytes
SHA-256: 90ad389e3b25125d1faf5d8e64fbe4a4cb48f6191816d4f323e2bfe7bd31b6c6
font_04_sfnt_off000190de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190DE 13608 bytes
SHA-256: 8fa7b5842cc6b0c1671a4c87654770912202d2a8beeed946851b6021c0646c9b
font_05_sfnt_off0001bcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCC7 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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