Malicious PDF — malware analysis report

Static analysis result for SHA-256 120a6cca4098fbed…

MALICIOUS

PDF

76.9 KB Created: 2021-03-19 18:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3604efbba936437ce7147e099d8e5413 SHA-1: 5cbac00109525b0624fc463eb42ac2144a0140da SHA-256: 120a6cca4098fbed2412a555135823134c1a18c585b95b07881a508f10043422
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to direct users to malicious websites. The primary URL, 'https://nipisod.ru/strik?utm_term=percy+jackson+sea+of+monsters+movie+google+doc', suggests a lure related to popular media to entice clicks. ClamAV and ML classifiers also identified this file as malicious, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://nipisod.ru/strik?utm_term=percy+jackson+sea+of+monsters+movie+google+doc
    • https://cdn-cms.f-static.net/uploads/4384851/normal_60370e702fc98.pdf
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5fd61dabd37bd.pdf
    • https://cdn-cms.f-static.net/uploads/4369654/normal_60290e42bfdca.pdf
    • http://bifokagomasema.iblogger.org/sekizij.pdf
    • https://vixezikuf.weebly.com/uploads/1/3/1/3/131383943/gupadeburebe.pdf
    • https://cdn-cms.f-static.net/uploads/4455399/normal_5fd8ef87211d8.pdf
    • https://cdn-cms.f-static.net/uploads/4383924/normal_602c7d566f2a4.pdf
    • http://skidki-day.site/925621123396kiu2.pdf
    • https://nagofojog.weebly.com/uploads/1/3/4/5/134586362/292c23cecb.pdf
    • http://copalofa.site/self-_absorption_definition_physicswh089.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_c61342b051374bff9e7010c9e71e9303.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8e3d6774-4c2c-45e3-b3f3-cbec0c20b804/30612087475.pdf
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_01c6efa678954fe88a02423d1e046ca8.pdf?index=true
    • http://gasukexopesifu.epizy.com/tomuviji.pdf
    • http://darupaw.epizy.com/hbr_guide_to_better_business_writing_free.pdf
    • https://30d6ba4c-d201-4e26-8f31-a0e059b28788.filesusr.com/ugd/f9b8bb_fee69aa098c54e8a81880fd62ecb0a63.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ca15b7a-ac4c-4f6b-8ff7-263a5ee83d19/nunodojewagepeneliviki.pdf
    • https://uploads.strikinglycdn.com/files/6157b151-b4bb-4c06-8dde-7a2f7ba13a34/86490945017.pdf
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_f3d7c954566644dcbd4e21f268f22024.pdf?index=true
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_a3023e7028554523b4a6e3898865fcc0.pdf?index=true
    • 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_off0000ebad.bin
5e1ab07dff041231a6eb0dda7db8345ca5752d7b2ab468f6b98313e5e36a0fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 5644 bytes
font_01_sfnt_off0000fee7.bin
e1478e7dfee2f292b1b521378e602743a8b84aae6aabc407898ce389d0d7ce83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 11776 bytes

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