Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48af4f796df5164…

MALICIOUS

PDF

78.6 KB Created: 2021-03-27 11:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3097b414ef0968663c0ad05bfb95ee27 SHA-1: 510e2b525654e934a210f8e9051a1b41ac129c69 SHA-256: d48af4f796df5164076aee61dba490a43852132bdb9aca3c6dc03651558a4d6b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. The document body, though heavily obfuscated, contains references to 'Sailor moon pc game free', indicating a lure to attract clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=sailor+moon+pc+game+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fe8aab31b1eb.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/mifexad.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/9693942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_601bd56137641.pdfIn PDF document text
    • https://vujipobunovopo.weebly.com/uploads/1/3/5/3/135324227/faece73f79b6.pdfIn PDF document text
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/tololaro.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/resula.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/71315003820.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/nimobalajamivuvir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_6022291a0997d.pdfIn PDF document text
    • https://zajutarox.weebly.com/uploads/1/3/0/8/130814803/lewab_puzebefisapos.pdfIn PDF document text
    • https://vejazisiji.weebly.com/uploads/1/3/0/9/130969480/pixanapukuwezegulet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/background_images_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1477a44-af68-4f06-8eb7-0fde9cd62875/46645107572.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_3d14f9aed1ad4846b42f7cb5bf208a80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divikufifir/blackmart_alpha_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cfcab2f-558b-4805-b884-2f1d16cf44c5/dragon_age_origins_dlc_gifts.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_c9436209c39e407aa1cffb48378ee8fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/76638832419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7709fa79-b78c-4018-94ea-be43afca1c75/tres_metros_sobre_el_cielo_2_pelicula_completa_parte_1.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/can_you_netflix_movies_on_laptop.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_f41bc6d639f24fb4ae55aa39f1b0ee2b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/48641aef-40e4-4821-9d7c-8cf17b4a68d2/goxuzeboditi.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_off0000f556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 5260 bytes
SHA-256: 3dba4319702e242a4c54e422764638f6f71368da973690857ab55da70712b1d4
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 11100 bytes
SHA-256: 13d3d432ca53eb733462400bd76e28d85fe9390b530ac942fd543ec596eead68