Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb127b3ebda593a6…

MALICIOUS

PDF

78.5 KB Created: 2021-06-07 01:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b3c29d5e0a0ecec05ec80d4ecf9c217 SHA-1: ef2883dcdde292be23e054ac1b68d80550c6c579 SHA-256: eb127b3ebda593a6ea6bbfcc36665b08a39e200bf372b33a5e5838a4c87f0f50
186 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://krisoc.ru/pbw?utm_term=how+can+i+get+more+views+on+my+whatsapp+status PDF link annotation
    • https://julalawigito.weebly.com/uploads/1/3/4/8/134869680/sutewopuki.pdfIn PDF document text
    • https://gowumijase.weebly.com/uploads/1/3/7/5/137515347/9186185.pdfIn PDF document text
    • https://tovegema.weebly.com/uploads/1/3/4/5/134505564/venavinabeneg-kavotasusororez-nelagivelil.pdfIn PDF document text
    • https://mototide.weebly.com/uploads/1/3/2/7/132710683/375e3.pdfIn PDF document text
    • https://puwakama.weebly.com/uploads/1/3/4/4/134474688/2681233.pdfIn PDF document text
    • https://lufavipipoj.weebly.com/uploads/1/3/4/5/134580953/jegebodo.pdfIn PDF document text
    • https://sopowifumerage.weebly.com/uploads/1/3/4/3/134355846/240721f12c73.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/pokos.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/fipegiju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144449469/fizegeximedod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af2dfc0-dcc1-4fd6-b098-b44878a39ff5/zajamebujavewobimuri.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/kinemaster_diamond_mod_apk_download_2020_apkpure.pdfIn PDF document text
    • http://xibosini.pbworks.com/f/zombie_horse_in_minecraft_pocket_edition.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/jifefel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf550f9-adc4-43aa-ac0c-dca9fb251042/kujobevivezelevakakugike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71863c8a-936d-4dc0-a583-e5cae1839cec/74340380519.pdfIn PDF document text
    • http://nozobitativi.pbworks.com/f/argumentative_essay_about_drugs_examples.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 5528 bytes
SHA-256: bd3242a1749087fb293bf2be7ed47c5172f729fcf177ac794b519737ca870f5f
font_01_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 11628 bytes
SHA-256: db3a51b96954f2a05d42fb9c1b1640a163be14e20c3c4338ca2870e952a6dc97
font_02_sfnt_off0001153b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153B 16144 bytes
SHA-256: bc763ce08451904ac5abe8a3828cb744a601796bb742c3c4e61524483dda2a5d

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