Malicious PDF — malware analysis report

Static analysis result for SHA-256 af06028a6d8bf7aa…

MALICIOUS

PDF

75.9 KB Created: 2021-05-12 20:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 046fd66ac30a69c2340c8158b68bb966 SHA-1: 59be316e68443b955abc7bc4f4891fe1cf6b85c0 SHA-256: af06028a6d8bf7aaf6199d5bb67ea82e7d97d7573672df711e6b504adce4f7d5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation scheme. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external URIs, including those on Weebly and other disposable domains, suggests an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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
  • 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://botokaw.ru/strik?utm_term=amar+chitra+katha+books+india PDF link annotation
    • https://pudixelive.weebly.com/uploads/1/3/4/7/134733907/346761.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/jumuxinarovupufobobed.pdfIn PDF document text
    • https://wuwemupijebuvat.weebly.com/uploads/1/3/4/0/134012408/mejovej_lofiraxag_xesofeb_gekikisijoza.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/zezexugunaren_wusetuzas.pdfIn PDF document text
    • http://belepebo.mywebcommunity.org/zagevaxipeludiwesegita.pdfIn PDF document text
    • http://24goodstore.site/beyblade_burst_turbo_episodes_freeqvogg.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/3262239.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://tatudikugox.weebly.com/uploads/1/3/4/7/134738012/puxosonaxepejikafe.pdfIn PDF document text
    • https://muzuwetabez.weebly.com/uploads/1/3/1/4/131483468/zafikivevajaleguf.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/finet_powebumogovu.pdfIn PDF document text
    • http://kunutudusoxa.mywebcommunity.org/burning_mouth_syndrome_treatment.pdfIn PDF document text
    • http://sweetmeet.online/1704755224a26is.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/contemporary_nursing_issues_trends__management_8th_edition_apa_citation.pdfIn PDF document text
    • https://wosefekolejareb.weebly.com/uploads/1/3/4/3/134340916/4917225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_4ab0e6b00b064b0d9e8f91896865e938.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/diaper_genie_carbon_filter_install.pdfIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_8d615e73bd864dce92ca710e87208678.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/zopitaxufak.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_4c7fa7e303274578ac93e5b346525693.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/godewumazek/huawei_cro-_u00_frp_bypass_apk.pdfIn PDF document text
    • http://zedowep.atwebpages.com/levomuku.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_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 5340 bytes
SHA-256: 56d1e1ba2526accf06de2a2583286a695b81b2e1e4e730335e81bba02e583fc3
font_01_sfnt_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 1936 bytes
SHA-256: 7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a
font_02_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 10908 bytes
SHA-256: c7834c95a0f2dc04f95f4dadb5421d82c82dc0e09b4f09b237329147cd7e3b7b