Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d0f60ace4fb9c0…

MALICIOUS

PDF

88.2 KB Created: 2021-03-30 12:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 140b3e2658ccb20e0dda731f177017b7 SHA-1: b990c639c16780dea9ded282561613a118fe1dc2 SHA-256: f0d0f60ace4fb9c0464da7e1c3ef61a0eb153b4d1b69d9ec272a73531aee1458
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/aws?utm_term=bless+me+ultima+audiobook+mp3 PDF link annotation
    • http://cyberlife.store/jefosifemakkw32n.pdfIn PDF document text
    • http://fitokaps.xyz/fundamentals_of_differential_equations_8th_edition_nagle_solutions_manualtda7c.pdfIn PDF document text
    • http://loxokunetuladi.66ghz.com/28_creencias_adventistas_resumidas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fe4bec4239f9.pdfIn PDF document text
    • http://lnstagram-office.com/tezusetata7bi97.pdfIn PDF document text
    • http://storeplus.pro/memmedbagir_bagirzade_xatireler_mp3_yukleoo0h0.pdfIn PDF document text
    • http://nosinoski.shop/7144579841ilwm7.pdfIn PDF document text
    • http://mmmuuuue.space/short_moral_stories_for_kids9bqai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_5fdc41d048227.pdfIn PDF document text
    • http://davifil.iblogger.org/safebujejezemeluvirenefuw.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/vavabi/83720355852.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/restschuld_annuiteit_berekenen_formule.pdfIn PDF document text
    • http://polexunew.epizy.com/68237762766.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_208156c79a044981a56731a4576541ce.pdf?index=trueIn PDF document text
    • http://rukojipunuwupur.epizy.com/6374333293.pdfIn PDF document text
    • http://zukevajisuw.rf.gd/blood_culture_and_sensitivity_report.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_36072822e0f34c28a4278381a1554e11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/mage_the_awakening_2ed.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/nirema.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_e2117ac02f4c482aa61b3c5468c3392b.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 3068 bytes
SHA-256: 73557fd4b9a2faa9f31fa694fff4ee7b49963c6428b4887cd33583d0d4a3c7ed
font_01_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 5424 bytes
SHA-256: dc19e08a81ff7317b73d8566062dc3a3184f5266c072041baf479a52b131c756
font_02_sfnt_off0001094e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 2128 bytes
SHA-256: 994e7822b1fb56bffb26d437483d35b95203e491f59001fb2ca858f515f03ea0
font_03_sfnt_off0001131e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131E 12992 bytes
SHA-256: aae2a10aa66c9afddb7a1542ff6753dddef6ba9f3b7b62de73bd974b0e5ad1b6
font_04_sfnt_off00013d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D32 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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