Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e63a1bca41fa0b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 12:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fc895f8c9c815b9a8efc90454ca34de4 SHA-1: ba75a9f2aed801d675e3661fd6b2195e9f3e01e2 SHA-256: d3e63a1bca41fa0b55a01553562d1cd24d6ee0260801521db0bcb26a4361ce12
156 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, and it contains a significant number of external links, many of which point to unknown or potentially malicious domains. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://bologen.ru/123?utm_term=barbie+coloring+pages+printable+pdf PDF link annotation
    • http://worldthailand.fun/300635822957z0jj.pdfIn PDF document text
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/9d2dbc25.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/sinubirajomo.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/b04cb1fe6d.pdfIn PDF document text
    • http://geleostone.online/genie_intellicode_keypad_setupd5v06.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/d45b2fc5e.pdfIn PDF document text
    • https://derimazigazudi.weebly.com/uploads/1/3/4/1/134131427/b29cdadb248.pdfIn PDF document text
    • https://vadalafazewa.weebly.com/uploads/1/3/4/8/134897988/xanixexid-liwepezokof-gevodajigire-tirevexof.pdfIn PDF document text
    • https://lurenosofen.weebly.com/uploads/1/3/0/7/130740325/151078.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/takurugilij/bemanningsavtalet_lo.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/21017795085.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/53022361639.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/how_to_take_oscp_exam.pdfIn PDF document text
    • http://lubagolole.rf.gd/69767994706.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/cookware_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/37599642545.pdfIn PDF document text
    • http://bejopirobi.epizy.com/gawikafuziti.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/93096201966.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/23880316040.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_off0000f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 5512 bytes
SHA-256: dfdf9d0223a404abad0f338862e4cb467e5ce939c91443ed9954e6533e90afc3
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10476 bytes
SHA-256: 06cf15022bc0f37f70ddafe2d160dfd784f484d8c419fbcc839b7f71bbe4bd05

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