Malicious PDF — malware analysis report

Static analysis result for SHA-256 54af5692c1f99a56…

MALICIOUS

PDF

88.1 KB Created: 2021-04-27 21:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d10d63bbebeaf7be29f58d92e0d7da28 SHA-1: 2b03a5e42691202a66089ad147340cce41fdb0b8 SHA-256: 54af5692c1f99a56f7d627631d2005f0399e22f850f8771f2363fb6f30f01588
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or direct users to malicious sites. One of the embedded URLs, 'https://ponafet.ru/strik?utm_term=is+there+going+to+be+an+unwanteds+movie', is flagged as suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=is+there+going+to+be+an+unwanteds+movie PDF link annotation
    • http://itravelgr.com/tewagononou3ypq.pdfIn PDF document text
    • http://halfraire.xyz/sowovaykbah.pdfIn PDF document text
    • http://golden-charm.ru/osha_safety_certification_online_freeytmgt.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://bb209e34-24c3-4901-88bd-c00af8cda710.filesusr.com/ugd/de6798_70c1cd302e214521bdfb69fa383845e6.pdf?index=trueIn PDF document text
    • http://soromivimurug.epizy.com/analogies_mcqs_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/freshwater_fishing_lure_guide.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_4e3c05541c554d1a96bc92964012e779.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/polemaviz.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_fca68b04fb584a959ee537050e459d42.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/wofodokoketel.pdfIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_000851a8d91140bd95dd14f1351de6d6.pdf?index=trueIn PDF document text
    • http://sutejapikomi.epizy.com/cazadores_de_sombras_renacimiento_1.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/wexusilag.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/23937191281.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/zigimamekuvekopudedu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/how_to_trade_in_forex_for_beginners.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_62ffed68693c4acba30e44fcc6f50b5c.pdf?index=trueIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_6643a2512da1477ba2d4895129df8d97.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/jifobasogulifakeduragovig.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/detatebobududebulu.pdfIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_de82cb78d317487aa713c15d85ae670e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE4 5316 bytes
SHA-256: a48ed39c284ba9c1116d57df60f0d084039e34b8811c5051ceb22a89f141b5f1
font_01_sfnt_off00011dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD4 11080 bytes
SHA-256: 98e84f5094120828e3208f08b93cb62eabfd807db923e74675e53d8a4f7fc42d
font_02_sfnt_off0001434c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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