Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46ab8e27cfe691d…

MALICIOUS

PDF

73.7 KB Created: 2020-11-25 06:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bda222d2ab55172e737b69fd532f3704 SHA-1: 146f0e5bd613db659e1a94cd4adfd1e7ac6e188c SHA-256: b46ab8e27cfe691d039d3a6b07334733b623f3c4525af95931c78246256f30ea
236 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains multiple heuristics indicating it is a phishing lure, specifically impersonating a cloud document service to solicit credentials. It includes numerous external links, with one pointing to a redirector URL that likely leads to the phishing page. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the presence of embedded URLs and the phishing lure strongly suggest an attempt to deliver a malicious payload or capture credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sasugitakog.weebly.com/uploads/1/3/4/6/134651708/a7f5716aa.pdf.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://traffset.ru/strik?utm_term=dod+cyber+awareness+challenge+answers+2020 PDF link annotation
    • https://sasugitakog.weebly.com/uploads/1/3/4/6/134651708/a7f5716aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449192/normal_5fa669484a0d6.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/89776a21.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/jamokaroxoj/leganuvimifowa.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/lotizapupazipafeli.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/baahubali_movie_filmywap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26bf38ad-ab07-4d7c-acb3-1ff4238def0d/42595785679.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/16815469633.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/68094153071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c6490f-6e1e-4587-8a44-d00da4ca95aa/topalukovuzubovozur.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 7

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_off0000e1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 5808 bytes
SHA-256: 392fd06c2c29f59d2d629bd83849a265ea3868c1a6a9595f39a5a5f8cf9170c6
font_01_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 10728 bytes
SHA-256: 982b441947ee4048803d586192537acd8f261d385caa084a8a8602c71a751216

Open this report in the interactive analyzer, or submit your own file for analysis.