Malicious PDF — malware analysis report

Static analysis result for SHA-256 005a611d0911c81e…

MALICIOUS

PDF

71.7 KB Created: 2020-11-23 08:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b371e5fe47f5a6fa4fb330f2ca99a414 SHA-1: 2016f5c8984d1ec7dd08201a139f02ea693c6f2a SHA-256: 005a611d0911c81e621dc5d98ce2a514d2c9689fa37f499418401301a5e5e066
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=haier+6000+btu+window+air+conditioner+manual In PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/c73b366479.pdfIn PDF document text
    • https://nibojesuko.weebly.com/uploads/1/3/4/3/134329062/4cd72dc.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/wakenutikugeza.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.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/dorobukasawituw/3d_sky_bed_vol_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/convertir_cade_simu_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3457d1-a3eb-4f66-adb8-4137b1bb05e9/rimefugafemeditez.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/ligufedebukojizuroken.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/24599677595.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/67407686232.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/vista_20se_programming_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e719c0-6538-4360-9b4e-75a14eddffb4/tetarujupifulinasorenijol.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/vegoditelaxukolex.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/2170474263.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/beronaxubuguke.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/90395321993.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/ymca_state_swim_meet_2020_pa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 5276 bytes
SHA-256: f441cf9fbe781aab592b1c3e4e0ee59bee8dbd14999b2d2ed3d6d62626201ebd
font_01_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 10496 bytes
SHA-256: 031b970f9e103e6d203fb4891135a6a232e1faf194bb91a91741e87b422026e0
font_02_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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