Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e486b37c1cd7ae…

MALICIOUS

PDF

64.5 KB Created: 2020-11-21 00:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10910e5bdac20d33fb4bee0b78eb265f SHA-1: 6e89c9a151d4d97331f2d0d664b85f1956ed8bb1 SHA-256: d2e486b37c1cd7aef8dac24572b8393c8ead098f6a9e6c87b20985ddf6b52bfa
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'worksheet', aligning with phishing or social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=genotype+phenotype+worksheet
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f8e3ab2ed69a.pdf
    • https://joweralifaj.weebly.com/uploads/1/3/4/3/134350132/zokit.pdf
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8c766b6029c.pdf
    • https://cdn-cms.f-static.net/uploads/4381344/normal_5f9a674f1dab3.pdf
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f8d95e19c381.pdf
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5f99b72b91611.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/jolevuwelaluje.pdf
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5f99387e3e852.pdf
    • https://cdn-cms.f-static.net/uploads/4419633/normal_5f9bc3160f9dd.pdf
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f926612accab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/11f78342-3096-4397-8639-2b266a012ebe/nasikiwinosojojel.pdf
    • https://uploads.strikinglycdn.com/files/208ef85c-594f-4188-80e8-1d49349137a1/kigivulukupuguxoxinewowi.pdf
    • https://uploads.strikinglycdn.com/files/44df300d-af12-4f2f-96c1-c049a8221289/compound_inequalities_worksheet_word_problems.pdf
    • https://uploads.strikinglycdn.com/files/81bf170f-5b38-4ae2-8a49-89f1e2b61a4b/t7_power_max.pdf
    • https://uploads.strikinglycdn.com/files/92ba16f9-8bda-4555-b2a0-249749cd1a11/9789638250.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c217.bin
5a6162321e928aa8b7c7a42eb04441dd760a0bfd02c835ac6693861fe898fc1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 4952 bytes
font_01_sfnt_off0000d30d.bin
8ece57c82e6146d7c7c0d92dae786012c87421c7ba580a74bbac338861481d08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD30D 10036 bytes

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