Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dd0afcb345fa1a…

MALICIOUS

PDF

72.9 KB Created: 2021-03-22 06:26:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5740069fbf1ba4c6f8977984edf5a587 SHA-1: 1c255d8ea4a5b230348f93a1cae6a647f4e89f80 SHA-256: 90dd0afcb345fa1a4b9da6c98086392083f174d7d1a23ff6d681ca52ab1a86a3
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 0.9997

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://crophysi.ru/123?utm_term=constant+velocity+particle+model+worksheet+answers PDF link annotation
    • http://sivesesugipode.scienceontheweb.net/aminoacidos_glucogenicos.pdfIn PDF document text
    • https://muvoletad.weebly.com/uploads/1/3/4/6/134642496/bilaloni_zebaxoxi_lesekez_jumitox.pdfIn PDF document text
    • https://kevelowomovozi.weebly.com/uploads/1/3/4/0/134012304/sarutegedosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6043515009fee.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/belojop-sojokikijugu-nireba-vuzog.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/o_reilly_introduction_to_python.pdfIn PDF document text
    • http://moxawunanenubop.sportsontheweb.net/kuvej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6014e3f7bc07a.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/nalotopaxuwi.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/29092010255.pdfIn PDF document text
    • https://dodikajopofibu.weebly.com/uploads/1/3/4/7/134704264/909780.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/satudifin/jiragodinitodokabur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7690e00e-30f3-4c27-8241-290415740cc6/how_to_set_ge_self_cleaning_oven.pdfIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_7013479e5d7d4730ba07c106d58b69e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/signed_hubzone_program_certification_signature_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4954cd1e-491d-4e06-bef4-7b1526c54b30/lebosonuwuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/heat_resistant_sheets_for_roof_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/99428203500.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_9adb667f81044934bec57f6cf5219b7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/65180418783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c883c3-33ef-4af2-8be9-469879217f43/git_cheat_sheet_github.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 5536 bytes
SHA-256: de14f4923c5986c85bc88fad7928107de3cc7672df14d0fac84f632dc2e1a053
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 10704 bytes
SHA-256: b0adf20d11e3f19a354465e8c959fa8bc5ee59b94a637c8af0fcc3561afde3f5

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