Malicious PDF — malware analysis report

Static analysis result for SHA-256 830587489a620c46…

MALICIOUS

PDF

75.9 KB Created: 2020-12-09 07:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71aaee4a1e52042f85cb6d815630d85c SHA-1: 60ca2114d455acaaec4fe7b7978881bcbc82df19 SHA-256: 830587489a620c461e957db131a323ff9920317d103c4e0390f8eb0a03ac46f4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=fundamentals+of+celestial+mechanics+danby+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f8ea55820593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475734/normal_5fab32c1b915f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5fbafbd901f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f991d768e117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_5fb9eaaac1c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5f9890e96dc62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fikuvine/namawevizufudeju.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/bundesliga_spielplan_2018_19.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/43586554557.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/problem_solving_skills_training.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/arteterapia_e_mandalas_uma_abordagem_junguiana.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/towugebeda.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/bel_air_song_lyrics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1412bcd1e280355d6a3a9/t/5fc349396457125654a5ee8c/1606633786234/jolas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 5380 bytes
SHA-256: 78d907a51510a9f77a89eebd8f4313dd35a80e8005857c692124cb56782a675b
font_01_sfnt_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 10732 bytes
SHA-256: ee53acfe11ceda0a6e1214b3ccd1b7652f39cba29b4fb9d0c590282019a0bd7d
font_02_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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