Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0d4076579d2bfd…

MALICIOUS

PDF

128.9 KB Created: 2021-06-06 10:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6b6218a8994cf886b4490162023e0c7e SHA-1: 189cc509dd8fa094e84f9a83db3bb48df6ab13f8 SHA-256: 7e0d4076579d2bfd48aaeabc0e45966205ba8fd6abbeab45c4d50faaf9c72518
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7099

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://chcial.ru/pbw?utm_term=lecturas+cortas+con+comprension+lectora+para+tercer+grado PDF link annotation
    • https://bawowafakapapo.weebly.com/uploads/1/3/4/0/134042412/jilij-zudelorinosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_605f8b9614992.pdfIn PDF document text
    • https://wovusowi.weebly.com/uploads/1/3/4/8/134886666/donimujujupemaz_bikek_sixikurita_rebemoxawod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_600dc5300f777.pdfIn PDF document text
    • https://nebofubegifeso.weebly.com/uploads/1/3/1/4/131437549/dizexome.pdfIn PDF document text
    • https://zesefoposijun.weebly.com/uploads/1/3/4/6/134672262/pebavopemez_daxoledojudowo_kodepipiwat.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420604/normal_60b637ab3eb5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_6001723569a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fdb97d850e9b.pdfIn PDF document text
    • https://surujesuf.weebly.com/uploads/1/3/4/7/134773125/ef2f2ec8da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_602bde73dfcfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_606ae00096346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_6031674029b30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5fc74fe05e755.pdfIn PDF document text
    • https://gipegilut.weebly.com/uploads/1/3/4/6/134699389/5473233.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144414915/mobile_cellular_communication_by_sasibhushana_rao.pdfIn PDF document text
    • http://jowenoxo.pbworks.com/f/pekejaputiforefeloluxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8304c24-097e-42fb-91ad-ac0c1ae2a310/65050529527.pdfIn PDF document text
    • http://jabodawo.pbworks.com/w/file/fetch/144610422/gemufaxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db976224-cb2a-477c-a973-b88b88695dbc/32301760448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5224f331-c25d-4b7b-88f7-352c9a4f95c6/kixixitakopenuzazed.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/30059351831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cae5c97-6bec-4a22-810c-68ed9839ea2e/sig_codes_practice.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/f/free_clarinet_sheet_music_christmas.pdfIn 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_off0001d7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7AB 1616 bytes
SHA-256: 2bdf0215ec1c47fd780bbe5e2f40b613b62cff51386fb473bed04f0c1cf01dad
font_01_sfnt_off0001dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFCB 5332 bytes
SHA-256: 296a839b49abd502fad9945f2a9c805c57629918071a5d71cb36bb74d1a9d506

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