Malicious PDF — malware analysis report

Static analysis result for SHA-256 abac52a4d68f14ee…

MALICIOUS

PDF

96.5 KB Created: 2021-03-16 19:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0aa4ea06160f110a3265fdbab5797758 SHA-1: 275e8e668e80c0fc378f50449e1f1549d060ed62 SHA-256: abac52a4d68f14ee214a891f770c133870d99c3ede337fbfbb9bfcb8e13e56e0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, and uses a popular movie song title in a URL as a lure. This indicates a likely SEO spam or phishing campaign. While no scripts were explicitly extracted, the presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with a high ML classifier score and ClamAV detection, strongly suggests malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/123?utm_term=bajrangi+bhaijaan+song++likewap PDF link annotation
    • http://devlp.design/calculus_of_variations_functional_examples1jqpk.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/irhj0ji/world_war_ii_movies_on_netflix_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/QgdgfLi/10973049823.pdfIn PDF document text
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/a6c224.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/sq1AYgg/bobezixafanuwaseperikag.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/3514978743.pdfIn PDF document text
    • https://sagisumofag.weebly.com/uploads/1/3/4/8/134882066/80590892a9.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/jM6OibM/sunega.pdfIn PDF document text
    • http://suporefebakibur.mygamesonline.org/mejofogid.pdfIn PDF document text
    • http://goods-amzon.com/sirupupoxidowolofpogs.pdfIn PDF document text
    • http://bekusududiko.iblogger.org/neminebupenelipuzolu.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/195104872580cj7g.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/7lihhf3/zodakapo.pdfIn PDF document text
    • http://vazamewugox.22web.org/soxefem.pdfIn PDF document text
    • http://sallely.xyz/sentry_safe_with_3_number_combination_and_keyhmjdv.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/1816470.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/goriwozogezuguzijmj1gk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_98ddf6cf24cd4a5e8182c814cfe1ce61.pdf?index=trueIn PDF document text
    • http://dawejur.atwebpages.com/44175096103.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/basic_and_clinical_pharmacology_practice_questions.pdfIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_bd7baaa84eb74c94b5cdcd38257f0a81.pdf?index=trueIn PDF document text
    • http://tukudapig.epizy.com/pujer.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 5500 bytes
SHA-256: e88d7257e924bc094ab37db04cc25197dd414dd8b3ca87c257b69cec7cf6dfa0
font_01_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00011777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 11484 bytes
SHA-256: d1c6eda7e3a36531bbcda3cb33cbef5b7735a079448f642c6472a469a4a4c00d
font_03_sfnt_off00013e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E73 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61
font_04_sfnt_off0001537a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1537A 10248 bytes
SHA-256: 5569803184a40658b51d764ae9b06af455a3ca7a0d567b9ff4e9fa9746347824

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