Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ffe5a839d1d434…

MALICIOUS

PDF

67.5 KB Created: 2020-12-21 20:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7f7b1ede815dd8b0675da9f92dde4a66 SHA-1: db5dcc74f4a43a1cd7f05da984db9fc9980a9baf SHA-256: 32ffe5a839d1d434778168abf7bc55fda8003cc49d058ef22bdbcba6be389493
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, one of which points to a potentially malicious URL. ClamAV detection further supports its malicious nature, identifying it as a phishing trojan.

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://ggtraff.ru/strik?utm_term=%25D1%2582%25D0%25B0%25D0%25BD%25D0%25BA+%25D1%2582+34+%25D1%2584%25D0%25BE%25D1%2582%25D0%25BE+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_5fda4bb99c21c.pdfIn PDF document text
    • https://gosabotef.weebly.com/uploads/1/3/4/3/134332229/15a45878f3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477387/normal_5fd81a3d925f1.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/rubide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc002d40b6b03258f30bf3d/t/5fc4f8efeaf37e3b64387b1d/1606744303766/sivopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544ca02e-e28f-4c9b-b520-cadb97114a76/recette_de_roscon_galicien.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9adac89-b390-4ce8-96b9-6953dbf767ef/lajobi_pinehurst_lifestyle_crib_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8829b8-2f6a-45ac-850b-aaeb0dac86cd/gopitabevoziranis.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/66192750279.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/semekadise.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a336ea4a794d5665861d/t/5fd61845dca221526038f611/1607866437580/bittorrent_mac_catalina.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b4e4c89e1c4b8fbd626a/t/5fc0f5fe18e72e5fdbf9d7fb/1606481419096/9321831384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1645c0e-2087-40ec-9558-179f990d26c5/15598892029.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_off0000c061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC061 5380 bytes
SHA-256: a6efce6763e12d58659b54c1a40ee3dcd61ac5b63504eda454eaefeabd2a51ba
font_01_sfnt_off0000d28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28D 14516 bytes
SHA-256: 14bb86bcc5806d872535d58d66a60dfd2b80703c3f41818fe1f36f69a2aaa696

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