Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7feb3c6731c227…

MALICIOUS

PDF

74.7 KB Created: 2021-01-02 08:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aa6b4093e57d91525c4c68b848aee9c0 SHA-1: 7533110ae6012a89ad22079e6fd0ed9e48cb1ea2 SHA-256: 0c7feb3c6731c227cae68a47765bc7cf78a96dc39b810d0bd8da9b75970cd2ba
156 Risk Score

Malware Insights

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

This PDF document contains numerous external links, characteristic of a link farm or phishing lure. The primary URL, https://traffnew.ru/wb?keyword=photo%20editor%20for%20android%20free%20download, suggests a pretext to trick users into downloading malicious content. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/wb?keyword=photo%20editor%20for%20android%20free%20download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fcd31f6bb883.pdfIn PDF document text
    • https://dalibigexewekef.weebly.com/uploads/1/3/2/7/132712129/1909320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5fa338e864c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5f99331f8ad02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fa07dd75cc82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zonivezada/32904797925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40fbb97e-dc1d-44c5-90c2-e9a3f994d834/azad_Kemir_ark_mahiya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0c49aa-7760-4692-a846-db50e1062e13/9529493865.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/masabewipelakadomujut.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/abhinaya_chakravarthy_kannada_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/template_flyer_dj_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/academic_planning_guide_allen_isd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b0df59-e3dd-43fc-9ede-259f158f2b3f/82742430204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9faf210c-f272-4b62-aed4-50bb8d531029/human_resource_management_mondy.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_off0000e997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 4908 bytes
SHA-256: 67590f2f0fd7a8d71ad8c285bd36f25cac1ff535a9ab761a3211e53155b725fb
font_01_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 10504 bytes
SHA-256: 269d71cfb97b3bbd8ce074a312f240e3ad950b906f4bd61d16decae0e62f39e3

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