Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9280aff387a928…

MALICIOUS

PDF

101.8 KB Created: 2021-03-15 04:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8a4f14fe1a2c593fb74299ba3d9cfa45 SHA-1: 9d59fe29de02def551d14ba9a47ead236b9dead1 SHA-256: 8a9280aff387a9281ebb75ea61151e40baa0923df8845f21e3091f607b689e5b
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 0.9988

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/award?keyword=basic+digital+marketing+pdf PDF link annotation
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/xupazevesuwu-kovaxeve-belusixovijokam-kukakoxofivolig.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/3624361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_5ff6ae6536a6f.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/86f4174b9a0c44d.pdfIn PDF document text
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/wujadetirunur.pdfIn PDF document text
    • http://medolufinumul.sportsontheweb.net/jaxerigitineser.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5ff2d55aa09f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_6021a58cba9ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_600aad30bafa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fdd334f7c969.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/8470416.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
    • http://bajekixizosi.myartsonline.com/modle_attestation_de_prise_en_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/diablo_3_necro_leveling_build_season_22.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_d2e1ef34ab6644d983d237312716dfad.pdf?index=trueIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_4656bb2cef7f46bdb9dcd4418558a330.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/nissan_370z_facelift_2013_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/fuzomedekepef.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/lifudikexakuzoxavuko.pdfIn PDF document text
    • http://gitodake.myartsonline.com/boston_matrix_model.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/52760817484.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/fumexowamotetetivoj.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_ae5cbe165903440685624d010a712a7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neporezofov/joretaradezikikejogese.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/63569145791.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_c9f365c89b1e4e9fb2b27338a6533540.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C3 5268 bytes
SHA-256: f19d24a7a68c66f268a2c4b42ec825e99a3d1146585fcc0d83f46a9b570e696d
font_01_sfnt_off0001578b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1578B 10612 bytes
SHA-256: 92932cf8de0bae480e36e8a54feae018d545c5b2885d08932a7a6b2536758bc2
font_02_sfnt_off00017bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BBF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.