Malicious PDF — malware analysis report

Static analysis result for SHA-256 7420ddca193cf30c…

MALICIOUS

PDF

75.9 KB Created: 2021-02-14 20:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4582c628e2226251db3102ca7aaef778 SHA-1: b989c0514074f93292fb42e8747676f746331351 SHA-256: 7420ddca193cf30cb7122435c3564fba1feadaf637c13b85e3252740a297a6b1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The embedded content, though heavily obfuscated, likely serves as a lure to encourage users to click on these external links.

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://jottigo.ru/aws?utm_term=guided+meditation+for+sleep+kenneth+soares PDF link annotation
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/439455.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/c305adc70.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/ggjj6ie/lugubifoduzikebup.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/dDCjVij/68714667083.pdfIn PDF document text
    • https://jajugodi.weebly.com/uploads/1/3/4/9/134902248/88ba9a3f0.pdfIn PDF document text
    • http://xumimoz.22web.org/fumodawufaxawefox.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/eJQItII/las_vegas_tours_to_grand_canyon_by_train.pdfIn PDF document text
    • https://bativajo.weebly.com/uploads/1/3/4/6/134662657/608c6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5fd799a004674.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/bmtja08/download_love_balls_mod_apk_android.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/5008196.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://meraxemuvixise.epizy.com/cellulose_degradation.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/against_medical_advice_form_veterinary.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/identifying_colors_worksheets.pdfIn PDF document text
    • http://durunorutap.epizy.com/12617400266.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/bsc_b._ed_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/animation_composer_after_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/malunulu.pdfIn PDF document text
    • http://voxafizuvukulam.epizy.com/gefomusujetirejiponogojog.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_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 5376 bytes
SHA-256: b0a921841e419359932e13cf496f3b59170f3db12e1fbc5cc71a543efaef5ae5
font_01_sfnt_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 10156 bytes
SHA-256: 9e5a8e1650f027d209c48003b9aa1e6a16c8e87d3e7c410ed0b4ff577828443a

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