Malicious PDF — malware analysis report

Static analysis result for SHA-256 98be795570ebce88…

MALICIOUS

PDF

73.9 KB Created: 2021-03-11 11:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2e65d0e0b248904108b6fef01b9d6e2 SHA-1: 7068767da18d411a56952ad9d5dba9bdb2bb439a SHA-256: 98be795570ebce884a9db4f5b8b7424f463c9ba1274192d444582fec55c01c42
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://midufefew.ru/award?keyword=sodium+bromide+msds+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5feefd720e8d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_6013e7284cce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464861/normal_60070dab00d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_60199aca42493.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/poresi/certisign_driver_leitora.pdfIn PDF document text
    • http://vavikanepib.rf.gd/85089880555.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/bujexulexasozijatowe.pdfIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_5a5533b9b7fa4b1e828c731e5000303f.pdf?index=trueIn PDF document text
    • http://vufagozujidivu.epizy.com/betoduxetawabapadiva.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/33137122549.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/behringer_xr16_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/zoxudisotafurigabaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/44736793478.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_623cfee7a2a245c2a8d460a62955b169.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_8154b1b75b0f48aa8484dd8da9e945b9.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_fc9f16e3ad904323b6b23dab0ba16d62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasutiz/general_bill_of_sale_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/new_holland_ls180_hydraulic_oil_type.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E1 5188 bytes
SHA-256: 81ecd758d3f7891ab7662486633e1e3b5b562616b74590ebd11a1eda33ff00b3
font_01_sfnt_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 10796 bytes
SHA-256: 2048f838dc7adf34e0a5a1e94da436534f1c4a478eae4784d0a60107bf8fdf40

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