Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ee0acd1991947c…

MALICIOUS

PDF

70.7 KB Created: 2020-11-17 21:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 68b325de5bc2e2da79a0699a9fa8a88e SHA-1: 4f74347d2c9771d7cd27f88b6efc6cdc21c6153c SHA-256: a0ee0acd1991947c2bc8864420ff0b25b52e853d198386a1d072e118e63ada1d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDF files, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL and the document body's deceptive content further support a phishing or malicious content delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=50th+birthday+cakes+for+him PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5f9726d7e0b6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5faa15526c032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f9bd8cceef26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fae145bad4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5f911989469a0.pdfIn PDF document text
    • https://dikosunasalimob.weebly.com/uploads/1/3/4/3/134363034/4a5dcaa5e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f935af3aaa73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/juduk/bill_nye_genes_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16592e9e-5067-4cfd-81cf-13f4589ab4e0/ragnar_benson.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/tf2_background_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8282865c-1bea-4da5-9ec3-14c1b9286d5e/67455393642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a17be1c-0082-4aa7-ad5f-f7b1f156c4d8/44962419863.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 5388 bytes
SHA-256: 483131719a74ebfa7054a644ffb3be1f26948652d0e91f3951cec8ba54ea5976
font_01_sfnt_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 10676 bytes
SHA-256: 452027d16fee9b002ff5df58077c42c610136b4af1b445408575f310418782df
font_02_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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