Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5efb57884c1675…

MALICIOUS

PDF

49.3 KB Created: 2020-11-07 09:21:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f07eff59c305d7b8aeab218ffbf0863e SHA-1: 24646aa10e2d99b0c1b3d263944534eac40b2206 SHA-256: 8c5efb57884c1675e1b8672b2dd06831f1d2990f135948ce8dbc6b93a612bcbe
96 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 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 1.0000

Heuristics 4

  • 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://traffset.ru/123?keyword=oregon+chainsaw+sharpening+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f9723d233f03.pdfIn PDF document text
    • https://negiwonilelif.weebly.com/uploads/1/3/4/5/134583179/gobowolovorab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f89519d9d905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_5f9041b2f35f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wopari/libro_el_poder_de_la_cabala.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/37623665041.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/movies_app_download_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/secrets_of_the_temple_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/tikifurulenuworobekatulo.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/neuphoric_skin_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/99467780910.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/kawoda.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/startup_investment_agreement_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/neruwedafefaduxasubovori.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/geometry_dash_apk_download_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/legal_age_of_consent_by_state.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 5224 bytes
SHA-256: 109bf59db911f604d450c5746c6cd633840a881b955bf556ac3439255f2aa003
font_01_sfnt_off000087ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EA 9848 bytes
SHA-256: 6b56ba19fb52bab1674941c5b92ad15a857f5f8104c0f9cc4a5913932981aa51
font_02_sfnt_off0000a9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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