Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99d0202fc20198b…

MALICIOUS

PDF

73.3 KB Created: 2021-03-17 04:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9450d9be4720d1bb4bc39f7fe897dd26 SHA-1: b6eebc8301c5260d4bfbdaa66cde44ac1ffd87c7 SHA-256: d99d0202fc20198b443c6374cb2e8505d5a69a2ad4abccabdc2a689c215689f9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=slumdog+millionaire+book+macmillan+pdf
    • https://cdn.sqhk.co/fefavezevir/vFgfmFl/office_boss_truckee.pdf
    • https://cdn.sqhk.co/petawelesup/IChdjip/rujumod.pdf
    • https://povitopol.weebly.com/uploads/1/3/4/6/134648875/e0a7b102921b0.pdf
    • https://cdn.sqhk.co/jegamaxegev/9RjcS93/18520480916.pdf
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/8896454.pdf
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/nerube.pdf
    • https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/6affebe1c7b.pdf
    • https://pejeronasoko.weebly.com/uploads/1/3/2/6/132682646/4a46c2759e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e46f1e97-c954-46f6-9362-c237009ccdc0/why_isnt_my_rca_antenna_working.pdf
    • https://uploads.strikinglycdn.com/files/3197a767-8214-43aa-8525-b9d5913f8875/samsung_a10_screen_replacement_near_me.pdf
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_535c769eab0c4f6b9459280910ea50db.pdf?index=true
    • https://s3.amazonaws.com/gimisorixosu/20480289137.pdf
    • https://uploads.strikinglycdn.com/files/e3089cf7-22b4-41c7-8f11-2306c1039205/civil_rights_timeline_on_the_u.s_between_1920_and_1950.pdf
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_51213172e3c94aeba511811b555a4ea4.pdf?index=true
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_8efd165a2ed14aa0bbf9599cf2052c7f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fdff4d41-d723-4fa6-9c76-a3a30cc13dbc/fazavo.pdf
    • https://aece7fbc-7072-4055-9cfa-29e0da41b620.filesusr.com/ugd/e878fd_0c181de0851d43579115b855b9fc1f48.pdf?index=true
    • https://s3.amazonaws.com/zukogi/56156551102.pdf
    • https://s3.amazonaws.com/vebenok/iq_test_with_answers_arabic.pdf
    • https://s3.amazonaws.com/wiwamoxamo/34571585690.pdf
    • https://s3.amazonaws.com/gazijewevan/71862756523.pdf
    • https://s3.amazonaws.com/watajive/dojelulabasugitekunifade.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/bobby_deol_songs.pdf
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_0fb9b1c4d5e04d70b070c4363a537b40.pdf?index=true
    • https://s3.amazonaws.com/fejakixoweka/hernando_alvarado_tezozomoc_cronica_mexicana.pdf
    • 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_off0000d7eb.bin
6ee579bf0368737b02ef318d38ad47799ba76cf7445ecaaeb0593f97f8cb45d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 5604 bytes
font_01_sfnt_off0000eae3.bin
f6a7da694a45867308d1483202d24ec7d96e6b14162779ef60435850f571dde4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 15464 bytes

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