Malicious PDF — malware analysis report

Static analysis result for SHA-256 32adcfad3c028ebe…

MALICIOUS

PDF

65.3 KB Created: 2020-12-23 01:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: abd381ca7767a96ace9cc219f5cd515e SHA-1: 8b793974594c5c9d54a3486629d28732b8f528ab SHA-256: 32adcfad3c028ebe91399c2287f424d822144ecc62c24861c26a6d9f5b5e1ca5
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL points to a link farm, suggesting an attempt to manipulate search engine results or redirect users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=vocational+rehabilitation+va+form In PDF document text
    • https://zamojimap.weebly.com/uploads/1/3/4/1/134131359/nanesonavozuberar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5f9bc504ee692.pdfIn PDF document text
    • https://lewejasolon.weebly.com/uploads/1/3/1/4/131437246/wejiw-xubovotumaset-zejoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5f98a966ec4cd.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/bipepezuwed/doorbell_transformer_for_nest_hello.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfd975c-aee7-489a-bd6e-2f495856dbc1/98601013115.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/lodanuzokitafadizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015cdf57-23be-4ba2-aab9-02e415e45427/mimokogozaso.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/mosefuwasapaliwebupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f31c818-9e60-4c52-a56a-d6e285c5058c/56962710559.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/gapovedifakag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569bfca7-96a0-479a-8c53-72c29e49db20/12341707205.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/luridefapemagivux.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/juxokixidatixolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae92d815-7e75-448d-8670-4c8aa2c71682/tibinufusarovoloj.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_off0000c20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20B 5108 bytes
SHA-256: 962d3a27b69e8b8c164f82a65deb511b9723045f51690b485ed8e39643156f9e
font_01_sfnt_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 10916 bytes
SHA-256: 6d98f6240d36874cb1ad005b24e81e064573ba2efab9e0c72dea9111cb7107b4

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