Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d50f89f174121c…

MALICIOUS

PDF

76.9 KB Created: 2021-02-09 07:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: dae536537dc6cfdf52157ff007816163 SHA-1: ae701f0eff0492993ee37c8a8b72d50cce88ff0d SHA-256: 87d50f89f174121c668434a67a06b18160466b95adb8df56c8474779bf8ff02f
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 as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, https://jottigo.ru/123?utm_term=jcpenney+store+closings+2017+list, suggests a lure related to store closings, likely to attract clicks. While no scripts were explicitly extracted, the PDF structure and the nature of the link farm indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

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://jottigo.ru/123?utm_term=jcpenney+store+closings+2017+list PDF link annotation
    • https://banetopebored.weebly.com/uploads/1/3/4/8/134874573/3476320378.pdfIn PDF document text
    • http://dudipoviju.22web.org/the_chainsmokers_closer_lyrics_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/bovavadas/jiohesH/ridivoforuninu.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/7Vja9gg/19221343286.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/hjRjeic/24882052819.pdfIn PDF document text
    • https://cdn.sqhk.co/wawerugile/TjcSha3/brimming_synonyms_and_antonyms.pdfIn PDF document text
    • https://pavimukafimedab.weebly.com/uploads/1/3/1/4/131483282/xulilopesawip.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/1541408.pdfIn PDF document text
    • http://sigonalen.22web.org/37743721260.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/genukopapovixo/52980808681.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/cours_anglais_et_franais.pdfIn PDF document text
    • http://xelilurezo.epizy.com/kagifito.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/15149043175.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/durable_power_of_attorney_form_colorado.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/finance_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/xupexegezadutijetagidipov.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_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 5388 bytes
SHA-256: 5a549b3bc9badba0e1b387ae6581884008e74e8732ad26b0816491f07ed960cd
font_01_sfnt_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 10940 bytes
SHA-256: 4b38a624df17bf1d5c87367d2f3b39371b3b8c1dc7f87cd75f43d0c0ac98f1ec

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