Malicious PDF — malware analysis report

Static analysis result for SHA-256 550076eef697010a…

MALICIOUS

PDF

69.4 KB Created: 2020-12-31 07:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 62ca36f5e061a98bbf700f5187ad5476 SHA-1: 34c50cbcd9e7f82668ddf11c6b2b91778e4a3231 SHA-256: 550076eef697010a01832a4f39d633e0acf2331be570262cadd8675f5ca21564
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or link farms. The primary purpose appears to be SEO poisoning or directing users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest malicious intent, likely as a phishing or redirection lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=world+history+study+guide+final+exam In PDF document text
    • https://cdn.sqhk.co/lerutefo/yjcEig6/pianistas_famosos_actuales_mexicanos.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/hhmoTjj/homemade_beauty_remedies_for_face.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
    • https://cdn.sqhk.co/zixajofazadi/P9Hrggm/best_pop_music_2020_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd14ca1-8964-4e1b-9ed9-b9387eed9ad7/65199994206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4b6a27-82e8-4104-b1b6-14c690c62933/aleister_crowley_thoth_tarot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d26b9c3-44e2-4ad1-8f36-1784e4bf2c81/1778136253.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/printable_breaker_box_label_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ace06fd-baaf-4457-98f7-5576c8d0b10a/22598901026.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/zupesigipobojif.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_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 5504 bytes
SHA-256: 4419abfd893d4f64ae09233b5ca10347cfbb8c9902514137a802d712c319d8e3
font_01_sfnt_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 10276 bytes
SHA-256: 49dd1db701771760665141b07cbe21940981597e9407cfc35dedc48d79be3594

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