Malicious PDF — malware analysis report

Static analysis result for SHA-256 79212ad80574c99f…

MALICIOUS

PDF

69.1 KB Created: 2020-11-13 19:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d97490440a3ebd605fc577a18b45f1a3 SHA-1: afac5aaf96ff8a6c88c690c230622869054ab192 SHA-256: 79212ad80574c99fab6703dd96e83e4b708a2063e40cbf7f5e394b5414dbc9d9
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm and a phishing/trojan detection by ClamAV. The document body, though heavily obfuscated, appears to be a lure related to 'Phet simulations'. The presence of multiple external links suggests an attempt to direct users to potentially malicious content or phishing sites.

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://traffmen.ru/123?utm_term=phet+simulations+balloons+and+static+electricity+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5f9910f0c2526.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5f8b7bbf11562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5f90b1cbf0685.pdfIn PDF document text
    • https://jikomaviwibu.weebly.com/uploads/1/3/4/3/134365837/6262d17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f87bfb739e9f.pdfIn PDF document text
    • https://novafexoxola.weebly.com/uploads/1/3/4/4/134400343/denewijenedig-relologixexo-vawenujemakujaj.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/69928cd717bbfc.pdfIn PDF document text
    • https://nilozirarita.weebly.com/uploads/1/3/4/4/134463528/3226061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406777/normal_5f92b9be92709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5fa8e1adb9e3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_5fae64a58af47.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://uploads.strikinglycdn.com/files/3b2d6f5f-df72-41f2-aad6-4ea8bd6d7d08/90586082061.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/random_gamertag_generator_playstation.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_off0000be74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE74 5396 bytes
SHA-256: edd0fdc533a220571309d6a080f0024900963d1e7d18bf8ec08bf22c54427865
font_01_sfnt_off0000d0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AD 11868 bytes
SHA-256: a1c3d587778626674139b75196ca814a8f6ff80adc3a2deb6df75eacdd1d6033
font_02_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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