Malicious PDF — malware analysis report

Static analysis result for SHA-256 0515459f394cdbb2…

MALICIOUS

PDF

74.3 KB Created: 2021-04-26 15:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ae48ae63f7669ef795c806018248bee1 SHA-1: 06a1951ceb4a39ef2f2db95deab5e9d7311b58fd SHA-256: 0515459f394cdbb2350b0507987bda9dbcc39b186107cd3cb64e51ddec4cb163
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://kuzutuzo.ru/strik?utm_term=toastmasters+table+topics+evaluation+tips PDF link annotation
    • http://dipenoguzel.sportsontheweb.net/the_lying_game_season_2_episode_10_dailymotion.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/janovugazimenazafuvesiw.pdfIn PDF document text
    • http://jisuvakuwiraza.medianewsonline.com/socrates_quotes_in_tamil.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/aja_ki_pro_ultra.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/cowboy_mouth.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/kelageketisefuv/gavekedivetogojeni.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/68484847921.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_1ab8236e1a784b7ea251a40f2558ee8a.pdf?index=trueIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_82b34643ff024741a5d297505f5743d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezux/app_to_annotate_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/63248665612.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_9c789cd06caa401ba438a0206a55f539.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/what_is_e1_error_in_carrier_ac.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/eu_gmp_guide_annex_11.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_2da245c2200b4289b304127dfb9213dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/7574571540.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/nhs_visual_identity_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/econometric_analysis_greene_solutions_manual.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_7675c21372da4981bd0b65e4b9179954.pdf?index=trueIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_c1d9db3e6805432b868e3504bfca6114.pdf?index=trueIn 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_off0000e524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE524 5228 bytes
SHA-256: cea04537ec7e8d36747d2bb552d92b38fd346c172079fb8399541e5d60be970a
font_01_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 10788 bytes
SHA-256: c46dbca72b9ee6c390279cdeb954871c4814b84cf98b5b95830f613ee400c233

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