Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea14ab4a6161b9a…

MALICIOUS

PDF

67.0 KB Created: 2021-03-03 18:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ed449d62ecc80d383e5ec210062b4c9f SHA-1: 50bcd7603a1f55d522c8dc37e2f570b237e450be SHA-256: cea14ab4a6161b9ad86f5e8ede9a26305fc168021b2f36e78b7da591b3384071
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the PDF structure suggest an attempt to exploit search engine optimization techniques to lure victims.

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://jumiwimov.ru/wix?keyword=tasty+planet+unblocked+hacked PDF link annotation
    • https://zibitevurus.weebly.com/uploads/1/3/0/7/130776177/6411531.pdfIn PDF document text
    • http://dezlice.ru/melocoton_loco_megan_maxwell_leer_onlinekpw4u.pdfIn PDF document text
    • http://allrecipes.pro/nudam86qnq.pdfIn PDF document text
    • http://itravelimpressions.com/39944663881cwrzf.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/17ccf33d4.pdfIn PDF document text
    • http://ridunculus.com/synchronize_icloud_contacts_with_androidluobo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365621/normal_5ffcfef642815.pdfIn PDF document text
    • http://dithetsen.xyz/alberta_wmu_map3i5wc.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/fujuporuji-folilu-loxuzefew-tibuwifugofi.pdfIn PDF document text
    • http://kdghy.online/sodurijr6n.pdfIn PDF document text
    • http://garant-ritual.online/xuzobiguzegurdju6n.pdfIn PDF document text
    • http://radanews.site/ansible_playbook_tasks_template6smut.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/zafirawit/21211670554.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/9781099179.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/ll_bean_flannel_sheets_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/tobufuxapenamop.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/75023038535.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/xepevejilexomapofimovita.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_off0000ca4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4C 5320 bytes
SHA-256: 4a77f3c2b137f45739c9ed246e672f1b886a96ca0cd37275bf7fef7da813b60d
font_01_sfnt_off0000dc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5D 10064 bytes
SHA-256: 936450d43644bade1418118ceb93389be5ef93d67ffe4080efdd305edeb43cd7

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