Malicious PDF — malware analysis report

Static analysis result for SHA-256 35764920de392ad1…

MALICIOUS

PDF

74.6 KB Created: 2021-03-18 20:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d688897de4bd44a6235cd354a236daba SHA-1: bc225713b0fb6c78aed338e3ae00cc02dccf0ed1 SHA-256: 35764920de392ad1209cdfaeb51227348d875d2ef7ac16ddab4a4308b9ba5ac8
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by multiple heuristics as a phishing lure. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+setup+fios+quantum+gateway+router In PDF document text
    • http://zuduwamani.mypressonline.com/what_do_i_need_to_start_ddp_yoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_6018029a038e6.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/22081832759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_60023636a73eb.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/addition_and_subtraction_worksheets_for_kindergarten.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421613/normal_5ffdf5a628100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479932/normal_602ae369c7061.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/what_is_the_poem_casey_at_the_bat_about.pdfIn PDF document text
    • http://gateguge.22web.org/bible_yoruba_apk.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/vudivuzakal/what_does_it_mean_when_your_security_light_blinks.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_06c2ce60caea4d0c9915f3a65dc9c976.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/xerakizikozotabalokuw.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/21_cfr_part_11_compliance.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_153561d3e23343c4a87baa7901ecd22b.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_86d2c1943bd94e5dabd3f2f43aaec0b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/introduction_to_real_analysis_by_william_f_trench_solutions_manual.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/time_management_for_dummies_book.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_off0000e4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A4 5472 bytes
SHA-256: 8a6eaf6402da96155a2c86b6062e547a430e73ccc9de2871b4d2fe161f2a4b07
font_01_sfnt_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 11176 bytes
SHA-256: 31fd8e9a51ea0b15942bdb91f31ef535f0f6dd01fbf22b35df9d8068934642fd