Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e745082107b4062…

MALICIOUS

PDF

77.8 KB Created: 2021-04-08 01:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e4888c709877fe432f09a18a6180db1f SHA-1: cf23e801718b0fe38469ccd243668e477c230816 SHA-256: 9e745082107b4062cdde216ca84a09e0fc1f5163f5f2d2da5adf9d06b71c02ef
136 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 ML classifiers, indicating a high likelihood of malicious intent. The presence of an SEO redirector link, disguised with a lure about 'poetry forms for elementary students', suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing or trojan delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://lozipotod.ru/strik?utm_term=poetry+forms+for+elementary+students PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366365/normal_6017891e547b1.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/59961477336.pdfIn PDF document text
    • http://kezijumedet.mypressonline.com/accounting_ledger_form.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/zipiligiposivazapi.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/kazipedunuk.pdfIn PDF document text
    • http://sakepugikunon.mypressonline.com/american_dream_in_literature.pdfIn PDF document text
    • http://bagidopivulo.mywebcommunity.org/youth_bible_study_lessons.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_5fd352aa1950e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380405/normal_5fcf4e56b202d.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/vuxagixil/joxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/what_if_movie_2010_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/24502163918.pdfIn PDF document text
    • http://joriboka.epizy.com/buffer_system_in_human_body.pdfIn PDF document text
    • http://nobegizoginipe.epizy.com/never_gymless_workout_routines.pdfIn PDF document text
    • http://xijivip.rf.gd/mathematical_statistics_1_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/21741086240.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/guided_reading_activities_year_1_tes.pdfIn PDF document text
    • http://xazawipobu.rf.gd/70025196906.pdfIn PDF document text
    • http://wavudipikudela.epizy.com/22_hebrew_letters_meaning.pdfIn PDF document text
    • http://wisiver.rf.gd/how_to_volunteer_at_a_hospice.pdfIn PDF document text
    • http://xosofidevutora.epizy.com/lexaboxotixofaduzenima.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 5156 bytes
SHA-256: 4ebd9355c04b54f9841ab2648394aca77893021e0662ec9c115230f79165cbc3
font_01_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 11268 bytes
SHA-256: 33bdaed12882f1b2bc0cce64610103f5926e504e3bf5a2afdb88d5eea149cb77

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