Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eaad4b19b82f7a…

MALICIOUS

PDF

65.6 KB Created: 2020-11-17 08:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7212835c8eabdcd0db21512cec470e71 SHA-1: e6e123909d7fbec972fb7eda18d429f0d4940fb8 SHA-256: 07eaad4b19b82f7a339027d13b6c2d5a19390f9e17323d73489f10f171f27770
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to external sites. The document body, though heavily obfuscated, contains text related to 'school dismissal manager create account', suggesting a lure for phishing or malware distribution. The presence of numerous external links, many hosted on disposable domains like weebly.com, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/123?utm_term=school+dismissal+manager+create+account PDF link annotation
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/c69bd8.pdfIn PDF document text
    • https://wemugevesusufe.weebly.com/uploads/1/3/4/4/134467109/2995918.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/9663117.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/gijovowaribifit.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/lonadubasadap.pdfIn PDF document text
    • https://tadazumagitose.weebly.com/uploads/1/3/3/9/133987040/68f46.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/fejenijovekozu/4th_grade_dolch_words_printable_flash_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d8eec9-c3d9-44d9-803b-8421526f9a35/download_videoder_apk_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5527ef81-db4f-4f1f-a8f1-cd986aa5741b/77118399188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8a83f0-8258-42fe-a572-f6cab3785e42/maroa_forsyth_schools_illinois.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/95557219223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e299fb-fb0e-4db4-a191-0d619a481979/nursing_diagnosis_for_chf_and_copd.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/google_sites_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa29d56-2bc0-4529-b322-385b4875dadd/donjoy_playmaker_knee_brace.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_off0000c90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 5456 bytes
SHA-256: 63df232c8f53912619cc13b60cf2141f3b88e6878bd2f573da8dbbb549f94138
font_01_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 8776 bytes
SHA-256: d6d0ad9d19d760609f0cd0ca2c0298d0edef8b98b8bc9f11a971c79c14b1d830

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