Malicious PDF — malware analysis report

Static analysis result for SHA-256 650429f013339f26…

MALICIOUS

PDF

521.5 KB Created: 2021-04-07 06:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 945f5574a82a10dcac13fbfe211274bd SHA-1: b604ac79668d76d289349f6e5a3b852b41f7c174 SHA-256: 650429f013339f26e4311a552fbce9acb4964f745d4a92fdd1689f00e125f9f3
152 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure for a free book download, which is a common phishing tactic. It redirects to a suspicious URL, 'https://jottigo.ru/award?keyword=hunger+games+book+free+online+pdf', which is likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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
  • 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://jottigo.ru/award?keyword=hunger+games+book+free+online+pdf PDF link annotation
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/tikujexojifesenipuki.pdfIn PDF document text
    • https://pejudipevunasu.weebly.com/uploads/1/3/5/3/135351173/zafiporixagux_xadimibukes_budar_rewonewoxatus.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/5000284.pdfIn PDF document text
    • http://tatanip.medianewsonline.com/bapufo.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/golakumejumetusoda.pdfIn PDF document text
    • https://desaboros.weebly.com/uploads/1/3/5/4/135400021/sopenipek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481163/normal_6007fb811d02a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5fffb266c9c06.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
    • http://kuwitabetegipo.myartsonline.com/22973486482.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/tagifabuxedazo.pdfIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/area_of_circle_word_problems_worksheet.pdfIn PDF document text
    • http://niselasot.atwebpages.com/nodejs_html_to_without_phantom.pdfIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_080ef108009748aba06f39e9c111643a.pdf?index=trueIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/red_a_crayons_story_worksheet.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/vatizakomulimidojogumu.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_off0007cfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFB0 5328 bytes
SHA-256: 32d53a467704a812ab8a53a439b88f7c593d34a828494eded587b4074f281492
font_01_sfnt_off0007e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A2 11356 bytes
SHA-256: da4d898e84498113b81a92463cd1f2317ef8178e413fe613bb5798f3a746474e
font_02_sfnt_off00080845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80845 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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