Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fb3571b1f6eb31…

MALICIOUS

PDF

74.1 KB Created: 2021-01-14 01:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ebcd188559148382fee8385137b0fb34 SHA-1: ab0017dcb4e32a1b745f3a62cc1ee6b613265129 SHA-256: d1fb3571b1f6eb315d7862aed571cfb4c2c1675096b2be478c3ba28df026971a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on free platforms like Weebly and Mozfiles, suggesting a link farm or phishing operation. The ClamAV detection as Pdf.Phishing.Trojan further supports this assessment. No scripts were extracted, but the structure and numerous external links point towards 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://trafftec.ru/123?utm_term=romeo+and+juliet+answer+key+act+2 PDF link annotation
    • https://nuropasidax.weebly.com/uploads/1/3/5/3/135393275/7503363.pdfIn PDF document text
    • https://site-1176903.mozfiles.com/files/1176903/9851438646.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/juxeda.pdfIn PDF document text
    • https://site-1168131.mozfiles.com/files/1168131/tisikefu.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/hfQjc7X/qr_barcode_scanner_software_download.pdfIn PDF document text
    • https://site-1173288.mozfiles.com/files/1173288/ieee_bibliography_format_latex.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/t-_mobile_home_internet_review.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/wiwamoxamo/25932593862.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/44th_wedding_anniversary_gift_traditional.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/agenda_2063_english.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/dream_catcher_instructions_to_print.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/adriano_celentano_i_want_to_know.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/31852911783.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_off0000e512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 5560 bytes
SHA-256: b5d4709c00d178dde23bb0512d6cf938e807b80770276d311c094827def2956e
font_01_sfnt_off0000f801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 10544 bytes
SHA-256: 2c11c9fb2f2b1470eae2297899c744b3a765983572370335a946069f47f0ab32

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