Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98a6969438ddb68…

MALICIOUS

PDF

76.2 KB Created: 2021-09-16 00:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d8ddd31864c75a29f945b87007ae54ac SHA-1: a176a8fb77b24e5661e0051f24d7625adbbb8ded SHA-256: a98a6969438ddb68b58d341d0876d592823995a7b6688b75c336e25843d69a4b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically pointing to a URL that appears to be a lure for 'super league mod apk android 1'. The PDF structure and the presence of embedded URIs suggest it is used to redirect users to potentially harmful websites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://crysiq.ru/uplcv?utm_term=super+league+mod+apk+android+1 PDF link annotation
    • http://multiflex.ru/userfiles/file/mibaloduxalimada.pdfIn PDF document text
    • http://lagrupacio.cat/file/3180731520.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb3f9eced2---kagoxuko.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/16527901172.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/fezolulu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16132eea64e6db---mutitupi.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/63220305900.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/61296214860.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/fexipokozopofig.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/duzininigudez.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/donisix.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/wuritofetetodiwirededase.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/35589648214.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/38890471280.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/viramikudozitaposazolef.pdfIn PDF document text
    • http://ipublicity.cz/data/file/bavogipufimu.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/sisijadisiwavap.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/49360899596.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/35067088085.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/kupexujasipiwajuberekozej.pdfIn PDF document text
    • http://hockeymro.ca/docs/file/wobepewoxub.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/wipojoviripabu.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/xetavesikedurug.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://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_off0000c50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50D 10788 bytes
SHA-256: c907813aa773b2187bb4dcc87e530e56c1d89a8da3c9bd0903acad2127069d7f
font_01_sfnt_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 17500 bytes
SHA-256: 3ffa099e21353227125b2090ff5e6ac236c778d8be973f8205c29bf12f34c9ca
font_02_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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