Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2349ca59af74c90…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 06:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: daa14232789e422f810430d9e9a9fa3d SHA-1: 0afa56ed7afd5577aca6e97687384a6544284f40 SHA-256: b2349ca59af74c90c6a82e3d8744cbf5093751d7844212918236f9bff0619f5f
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a suspicious domain ('xezojetit.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8479

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://xezojetit.ru/award?keyword=is+pedometer+step+counter+accurate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408987/normal_5fd36cffaf13a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_602b8241c5d33.pdfIn PDF document text
    • https://sedapelagug.weebly.com/uploads/1/3/4/1/134109100/wezamobalud-tenowepazuv-xigurij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_601c85cb360dc.pdfIn PDF document text
    • https://nijeliwawinezim.weebly.com/uploads/1/3/4/4/134497061/pakokazozibujajup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5ffece29c2644.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/zemunomipazikez/math_terms_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/packaged_drinking_water_plant_project_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/kermit_the_frog_meme_format.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/graco_pack_and_play_on_the_go_mattress.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/hungry_shark_modded_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/how_to_replace_sentry_safe_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/xamarin_android_listview_adapter_refresh.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_6adc82686beb4fd099cd34a2bdf37887.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woneketelak/lundahl_ll1660_datasheet.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_1611c2c0ebe14583ba617a0005442ffa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kosamupim/bnf_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/buvedumefijopewaremopif.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_84732e4fe823444a9e83d8301c284b6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/competencias_para_la_vida_segun_el_plan_de_estudios_2011.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_d39db5e0e9fd44548b70d88b1b90fcbd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/dazzle_fusion_software.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001127c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 5124 bytes
SHA-256: 21c4dc348507853b7cc44de4472db884f10fff38cd41ed8e855d17442a5a43c8