Malicious PDF — malware analysis report

Static analysis result for SHA-256 0112dc25bde28bb5…

MALICIOUS

PDF

120.0 KB Created: 2020-11-18 20:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbecd1a0afc8992dfc797458e1b9379b SHA-1: 76225592303dff55e9f45904f34a96abe9b2f07d SHA-256: 0112dc25bde28bb597b9d5704c381c5a521a1628c9e64ca073182dbab4e8e908
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded URLs and the nature of the links suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=athlean+x+beaxst+program+pdf
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f8be5797c185.pdf
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f943699352be.pdf
    • https://cdn-cms.f-static.net/uploads/4408002/normal_5f98b2314bc05.pdf
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5fa7961c74b64.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5f93a5d6bd075.pdf
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/xodamejuwij_putinixizo.pdf
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8752102ce60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e46c172e-74b0-4849-a9cc-3e7ba40cec5d/leverage_season_2_episode_1_watch_online.pdf
    • https://s3.amazonaws.com/fulosobezur/ergonomics_standards_and_guidelines_for_designers.pdf
    • https://uploads.strikinglycdn.com/files/b494b831-082e-4257-8c67-8fbcb7d29964/44395118886.pdf
    • https://s3.amazonaws.com/kakef/sherwin_williams_conversion_varnish_data_sheet.pdf
    • https://uploads.strikinglycdn.com/files/3ba2a0ec-4a19-45dd-aa27-eab875495d51/pefikevawaxatedatofidigo.pdf
    • https://s3.amazonaws.com/pazifetanegapu/dutobuvude.pdf
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017742.bin
731db4fa12c8fcbd5e411447cafae939763f39ef1d64e6c8617e913689c94963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17742 5652 bytes
font_01_sfnt_off00018a4c.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A4C 3720 bytes
font_02_sfnt_off000195af.bin
f71efe911c51609bd525c9ad9dae8d7f7758cb5fd6df8f92538f321684e35b7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x195AF 11380 bytes
font_03_sfnt_off0001bcbf.bin
531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCBF 16312 bytes

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