Malicious PDF — malware analysis report

Static analysis result for SHA-256 79566ef72391ae8d…

MALICIOUS

PDF

72.0 KB Created: 2021-01-24 04:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c9ced7ab6aeb1f0a95ea7db3918d8a61 SHA-1: 3320a0951b7a2f762c6f36d411df1f2c3c7ab53d SHA-256: 79566ef72391ae8d9cfc2ebeda27fa0668d0317ee9d7781fda29f12eb4b66b8c
164 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, suggesting an attempt to manipulate search engine results or distribute content. The presence of a URL related to 'speed hiker mod apk download' and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to lure users to potentially harmful content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/wb?keyword=speed%20hiker%20mod%20apk%20download PDF link annotation
    • https://cdn.sqhk.co/lozuzupadis/gdhe8Sa/5_seconds_of_summer_ages_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/xNigihc/wordsmith_tools_free_version.pdfIn PDF document text
    • https://site-1174832.mozfiles.com/files/1174832/baby_first_words_video.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/fiibjdG/kaspersky_mobile_antivirus_applock_web_security.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/hjTIghc/poblano_sauce_torchy_s.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/JThijjB/hotlink_protection_active.pdfIn PDF document text
    • https://fimupekegu.weebly.com/uploads/1/3/4/5/134502303/zanedudi.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/gjjcgcC/29027101643.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/bgjV1gg/escape_plan_2_netflix_deutschland.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/ji63hiQ/mokagulagivulipuvoximi.pdfIn PDF document text
    • https://cdn.sqhk.co/kisilusotuke/jhgfCib/pexubonu.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/4jhMI1Z/babebarum.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/ggjcjjX/stack_smash_ball_2020_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvumudupese.epizy.com/38439553088.pdfIn PDF document text
    • http://kamiwivexa.epizy.com/xubivunavow.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_off0000db27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB27 5280 bytes
SHA-256: f45155c37fecde83fb49322344b70d81af26972654a603be356160354e678a29
font_01_sfnt_off0000ed00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 11232 bytes
SHA-256: 584afe8af017f20b278aa9e25f33fd63aa5371ffe0fffd1081b1cd18dcbf404a

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