Malicious PDF — malware analysis report

Static analysis result for SHA-256 6975d3a7dde537ac…

MALICIOUS

PDF

89.5 KB Created: 2021-05-17 01:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d8c372e222830af584c9578b11ce204e SHA-1: 6a4a37a9718b29ddc5ed7909e06e8c29b5117a27 SHA-256: 6975d3a7dde537acbe5b5d10e2e89eaffda1df2f20e27c42503a15ed573921c3
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which appear to be SEO-optimized lures for content, suggesting a link farm or phishing operation. The presence of ClamAV detection and ML flagging strongly indicates malicious intent. The document likely serves as a lure to download further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/strik?utm_term=how+to+restart+verifone PDF link annotation
    • http://f1l3download.site/pema_chodron_books_in_spanishdtoig.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/giLjiih/the_parietal_bone_formed_through_intramembranous_ossification.pdfIn PDF document text
    • http://montana-media.com/office_365_administrator_guidepy4xr.pdfIn PDF document text
    • http://morpeoplelife.ru/a_revolta_de_atlas_download_gratis4zjvc.pdfIn PDF document text
    • http://fb-ig-violation.com/tipotuxubemimuzex368ax.pdfIn PDF document text
    • http://iranianvc.com/napexurufanirumeparovqygf.pdfIn PDF document text
    • http://tokio-2020.fun/53943597364daq2d.pdfIn PDF document text
    • http://chaptejvxz.fun/jeep_cherokee_auto_to_manual_transmission_swap3ce9n.pdfIn PDF document text
    • http://mandarins.space/9901251285629dd.pdfIn PDF document text
    • http://avtoshtorki.shop/why_does_vera_lie_in_the_open_window47jj3.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/fhdry4J/download_cheat_energy_joe_mod_apk.pdfIn PDF document text
    • http://kefets.xyz/how_to_study_for_the_network_exam2xz58.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/dukajevo/school_guidance_counselor_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/adblock_free_chrome.pdfIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_f98703701f164c2c98d684fe2bdc12ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajujiju/wujebupalutetobi.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/venijuwojiloz.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_ee20ec8da1e447fd9e935db4671b131a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/ldn_muscle_cutting_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/arabic_stickers_for_whatsapp.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_f3ebfc7d026e43039f07444594520d54.pdf?index=trueIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_f39ba91b481540d68471a2cc759f4be4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7F 4844 bytes
SHA-256: f6a934fc991e377b0e7765d420d6241f3000bb267a4fd51e565841b33a10af99
font_01_sfnt_off00012e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E19 12712 bytes
SHA-256: 5b481dafd6f3615a4187bc0840e8e218e283f92efa7b442ed6f3aa0ff0425d16

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