Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ece24ec03c8fc5a…

MALICIOUS

PDF

92.4 KB Created: 2021-04-03 02:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 72d4a50654d1bb21d961a55f9f4ec9e6 SHA-1: ebef89f96662254c13d72eeb351d2dd20d62e36b SHA-256: 7ece24ec03c8fc5a29401b2211be837a5a037d0adf33e60aa838c58bf661b420
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, indicating it functions as a link farm. One of the primary URLs, 'https://resalured.ru/strik?utm_term=tipo+de+bombas+hidraulicas+pdf', suggests a potential phishing lure related to hydraulic pump types. The presence of numerous links on disposable hosting further supports a malicious intent, likely to distribute phishing pages or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=tipo+de+bombas+hidraulicas+pdf PDF link annotation
    • https://cdn.sqhk.co/veludewozen/hLPhdfo/exo_members_oldest_to_youngest.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/GgggDmS/20549808830.pdfIn PDF document text
    • https://cdn.sqhk.co/fegozanodedu/agiL7ha/51042362639.pdfIn 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/9a195507-3611-4a1d-9370-2790f4842b56/98526861300.pdfIn PDF document text
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_ad676491b7d0466c9214927e0a49b91d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87497595-dc71-4aa7-9955-3af25a1ecbf9/eragon_movie_download_mp4.pdfIn PDF document text
    • https://0f3c41ac-de96-4ba7-a517-026d7435d592.filesusr.com/ugd/8631de_032f2e843eb7407ba66e0456c7489d00.pdf?index=trueIn PDF document text
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_33108c3091f14f56a7a51bd65a882089.pdf?index=trueIn PDF document text
    • http://pugupokevimukov.epizy.com/79053385052.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_fe71abddfbe24b2f8134a50a16fc4487.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5070b6-62d6-49ad-a755-3b9d032852d0/the_westing_game_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e39cd7f-b920-4242-a89a-c98f9171d9cf/xodojevozofewidofogij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908a43f9-6ef5-4d5d-8b46-c7ece0ee4260/integral_of_cosx_cos2x_dx.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_db8364ef0acc490ea28a834b0b6a56fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6d8223-d35c-4a8b-a63e-7b417b45d533/vatodovadirugikuviduwube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd7a201-3486-4249-8c90-43d1b2db14d3/who_makes_huskee_snow_blowers.pdfIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_b68f1a2903d4499aae8adcdb610d582c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f63c199-8910-494b-9681-bd6105da14e3/67399472861.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/iesna_footcandle_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e7b239-db91-488e-b261-cd038912a66a/88896518810.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 5484 bytes
SHA-256: 85473125c5ad4a1617bebe8cf41fdc4f0e55688197da980064e02039d809a350
font_01_sfnt_off0001239c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239C 13908 bytes
SHA-256: 60e00d2c170202bc39c773b1e5bc36195226080298c0c46a973451195429ae65
font_02_sfnt_off00014da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DA5 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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