Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cb7c1bb12a7646…

MALICIOUS

PDF

85.8 KB Created: 2021-05-06 09:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 961cabbbce5b04bcd8dd65725d04830c SHA-1: 249a328d25515e94f556fc228ff031f5a99f22f5 SHA-256: b3cb7c1bb12a764699a7b1ce2d439ef94baf309aa532f806d35812752299406e
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious and invisible links, with one specifically pointing to a known malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://gimoguvi.ru/strik?utm_term=does+sony+trinitron+wega+have+hdmi PDF link annotation
    • http://pisufixefonof.scienceontheweb.net/breast_cancer_project.pdfIn PDF document text
    • http://petersikdar.com/warrior_soul_lyrics7pnk8.pdfIn PDF document text
    • http://totalcreditcheck.info/597448664509m3uw.pdfIn PDF document text
    • http://goldstein.berlin/11237952973s33oe.pdfIn PDF document text
    • http://loginwithfb.site/lg_tromm_washer_oe_error_message6bnq0.pdfIn PDF document text
    • http://alkim.xyz/xogijof8xes2.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/82354590464jgmk2.pdfIn PDF document text
    • http://cheatyou.site/black_panther_a_nation_under_our_feet_book_34tkky.pdfIn PDF document text
    • http://memisada.mygamesonline.org/51538575826.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/agnello_di_dio_gen_rosso.pdfIn PDF document text
    • http://meetsalle.xyz/15331620816hidef.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/kobosejukegewabezifizuxap.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://s3.amazonaws.com/diwitapezu/zinosudemofan.pdfIn PDF document text
    • https://7fd9f749-07b0-48f8-ad51-68075edef824.filesusr.com/ugd/197648_253ab591a53a451291fef9fbda47c834.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_021da250ae09464bb7cde2dffadae815.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/estructura_de_un_texto_expositivo_informativo.pdfIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_380ef4b4685a46e19c7d9a6402da7e59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/application_form_meaning_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/employee_onboarding_checklist_template.pdfIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_76625ce0a6d04dc28b25a7d820f713ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/romilelemiketotopid.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_fe7f394b81044d63b8444d85e90467c0.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_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 5248 bytes
SHA-256: e6a2abecfdd54d927d517520114228f8b93c276df0d4dc02175c61ef1b82f221
font_01_sfnt_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 10876 bytes
SHA-256: 6cbc43310f1f159457053af4a28193d5aad42868b9f4173a0a0b69d63415734d
font_02_sfnt_off00013b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B23 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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