Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceec1da0ca6c525c…

MALICIOUS

PDF

66.6 KB Created: 2021-01-20 23:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bdde4c074d42ed310a1b57980a9b6141 SHA-1: 4f49e339e028aad266d613095c5f71958f9c0e43 SHA-256: ceec1da0ca6c525c038d29b3771145726b5e413981b92cb1ec66fadf23c527f5
236 Risk Score

Malware Insights

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

This PDF document employs a common phishing tactic by presenting itself as a useful resource, such as 'plant life cycle worksheets 3rd grade', to entice users. It utilizes a link farm and redirectors to obscure the ultimate destination of the downloaded files, which are often disguised as legitimate documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or facilitate further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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://traffnew.ru/123?utm_term=plant+life+cycle+worksheets+3rd+grade PDF link annotation
    • https://site-1180237.mozfiles.com/files/1180237/41095201166.pdfIn PDF document text
    • https://site-1168349.mozfiles.com/files/1168349/crackle_android_apk_free.pdfIn PDF document text
    • https://site-1177523.mozfiles.com/files/1177523/carnival_city_movies_online_booking.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/kufojulugosi.pdfIn PDF document text
    • https://site-1178541.mozfiles.com/files/1178541/vw_caddy_2018_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/2iePfia/rotten_teeth_in_dogs_pictures.pdfIn PDF document text
    • https://site-1176236.mozfiles.com/files/1176236/supreme_duelist_stickman.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/lodazojamuva/periodic_table_of_elements_coloring_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/wawivipire.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/aquarius_man_leo_woman_yahoo_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/6779984217.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/34860647198.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/additional_mathematics_360_textbook_answers.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_off0000c63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63F 5704 bytes
SHA-256: 3729c0b0bfceba6ef7f0fa39556cf1c51fc0686bb2b5dc4400d8c5ee8a98f227
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 10584 bytes
SHA-256: 3609d340b3dc1d563e6ff144e507b637b0f775b2bc4425ce37b9bfdf2dd66ae6

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