Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a70b4f15c38cec…

MALICIOUS

PDF

68.3 KB Created: 2020-11-11 16:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5b694f691995544d92b7784c0f54ee36 SHA-1: 908535cd784ab6e60d8ae9aa26c43e3257c59438 SHA-256: e9a70b4f15c38cec025e9aeca0fd55686bfd9d2362af10839382bdefed70d5bd
156 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 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://traffking.ru/strik?utm_term=quick+blue+powder+bleach+damaging PDF link annotation
    • https://pegebitejujag.weebly.com/uploads/1/3/4/4/134445458/963469.pdfIn PDF document text
    • https://mudodawi.weebly.com/uploads/1/3/4/6/134653299/9193000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_5f9a897c85802.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/8821510.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/zaxamagiputijor-wesakavul-kewaz.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/843f6d926b762.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/75a3393dc.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/napoledunadigo/6532358849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bda7317-8999-419f-909e-acc513227436/keretuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/infinite_campus_fmsd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/019753fa-0e23-4a11-90fa-5acbc11ab54a/tremor_games_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/53245626147.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/33203475277.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/ninavorufuzopa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/dusugebagamulibi.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/tuzekososabomotejusiba.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_off0000caa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA9 5668 bytes
SHA-256: 9195ecb9292621673f92a0f730dd8d60cf56fea684fadbee43346815d39a6697
font_01_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 11556 bytes
SHA-256: a20b81c69adeb3e80d5e7501e9d9e0d70f172bdaab173e69f589a772f542db9d

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