Malicious PDF — malware analysis report

Static analysis result for SHA-256 c033ecf2f7eb76b7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-08 03:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c31774457c0a4b152928d4688313c84d SHA-1: 11ae6784d45d30f93904437284de2b0474c0ba2f SHA-256: c033ecf2f7eb76b7ba291785702795a716e8146cf76a611f62a1e51e2a87fd85
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/aws?utm_term=my+favorite+things+movie+scene+the+sound+of+music PDF link annotation
    • http://vutisonoj.sportsontheweb.net/libros_de_fisica_basica.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/69226433045.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/who_wrote_the_quran_quora.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/640aa0b.pdfIn PDF document text
    • https://gabinabadebaxir.weebly.com/uploads/1/3/1/4/131408928/jisadilewakukijufi.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/tojirisubenedizoji.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/41608018165.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/hhdQkHC/radio_city_box_office_times.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/23005231930.pdfIn PDF document text
    • http://degimogug.mypressonline.com/35526120527.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/9uPhcy8/fantasy_premier_league_gameweek_12_deadline.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/QLidZgg/20792815301.pdfIn PDF document text
    • https://pakunifa.weebly.com/uploads/1/3/5/3/135307874/rojanugawakuzitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_55494c91d79f41bba01b14231dc13a7f.pdf?index=trueIn PDF document text
    • http://pazepoxi.atwebpages.com/what_is_the_purpose_of_the_wall_of_china.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_47660bfffe4e43ee968ad7b6ba0531c0.pdf?index=trueIn PDF document text
    • http://zewadomi.myartsonline.com/tufifirixosexuvufufuso.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/al_quran_all_surah_free_download_bangla_translation.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_335d58843fa643feae37ad878033f1d1.pdf?index=trueIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/electric_scooter_repair_san_diego.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D8 5568 bytes
SHA-256: eee49dec3497848ca093400db70e8fccedba172fcb881c9fcf8b7bf2286edb30
font_01_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10840 bytes
SHA-256: 78cb218e8ed3bdfa712df884663b24ecdfb4173f3b5fabef5fe39ef4bee24cc9

Open this report in the interactive analyzer, or submit your own file for analysis.