Malicious PDF — malware analysis report

Static analysis result for SHA-256 986a474370c3bf94…

MALICIOUS

PDF

76.9 KB Created: 2021-01-08 08:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9970abe2829cf35193f5e78f05e3444a SHA-1: c711472ef891f4eec972f6323c1b63be82597051 SHA-256: 986a474370c3bf943d1c4e525b5c0dcc3c03e9c784ceb9727f3f6f918a23c174
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm, and a visual download button, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=spider+man+3+psp+game+for+android PDF link annotation
    • https://cdn.sqhk.co/pomorezolo/OQfgcud/totiwogobilojitefo.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/chjyih2/85985559414.pdfIn PDF document text
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/baxadamipupugox-konub-nuzixezil.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.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/fajonubinomeder/2767067299.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/free_iphone_6_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/jurassic_park_theme_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/fuzapeto.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/nivawix.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/xizofunetusat.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/matifaxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/swot_template_for_mac_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/fortnite_aimbot_apk_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/jurassic_park_theme_violin_sheet_music_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 5596 bytes
SHA-256: 203c56209cd496a5ef2e49061c6cbda04b6b197a003a6881f8bef3a067b6ccfa
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 2236 bytes
SHA-256: 302910867e4439b649400b5bf8c5bb071a5b4563a03cffbb254d54f269036025
font_02_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 10824 bytes
SHA-256: b2faaee977869fbd7dcceec074ee8b7b0ec0c668d88853a53e8c43c51bff3d89

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