Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2572aa27e7d870b…

MALICIOUS

PDF

68.1 KB Created: 2021-02-15 11:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4e67e7ef9463712d15582265f0f54688 SHA-1: b446c1df6178d249ebb8d7b6042f6993f5c0b9c6 SHA-256: d2572aa27e7d870b86f294c0ee371c446c357604f09eea3d65708e2dd7ba45a5
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to potentially malicious sites, likely for phishing or to serve further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/wb?keyword=how%20to%20use%20neato%20d7 PDF link annotation
    • http://dream-stat.ru/jisipugazawez461q1.pdfIn PDF document text
    • https://vafebukuwu.weebly.com/uploads/1/3/1/1/131163563/9315057.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/hv8UvEN/netflix_prices_going_up_uk.pdfIn PDF document text
    • https://dumexegutotopu.weebly.com/uploads/1/3/4/3/134354144/7031829.pdfIn PDF document text
    • http://erkutungotu.com/periodic_table_of_elements_worksheet4sx31.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/3510853.pdfIn PDF document text
    • http://tublitalia.space/artusi_oven_user_manualfng5t.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/gQhjcXm/chicago_white_sox_2020_schedule_espn.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/6fe83c712377.pdfIn PDF document text
    • https://liziwozubol.weebly.com/uploads/1/3/4/8/134851467/ba28e1aa97c9.pdfIn PDF document text
    • https://zijedizadof.weebly.com/uploads/1/3/4/6/134692085/gajimezot-bebila-tifonizawi.pdfIn PDF document text
    • http://idealica-italiauficiale.website/cardfight_vanguard_arg_decklistfeb49.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/a59cfb.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/warapagefasovi/valorujiziti.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/whatsapp_for_windows_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/mofaxisesetowumerifi.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/aagadu_telugu_movie_mp4_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/kerokikamap.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_off0000cd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9D 4824 bytes
SHA-256: d8b34a0d07f16dc06e283a3bb634be248d7ceaff3e21e1213cc28e6e0bd67912
font_01_sfnt_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 11188 bytes
SHA-256: f1a4ede92134b0ce9ece91402ed8c114e8db7d7987c375dc9b7ab16ae31270f1

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