Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc9d6cd8bdcfbcd…

MALICIOUS

PDF

90.5 KB Created: 2021-05-08 06:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 998252e8b118b6d973f61d0a1ce015cb SHA-1: 16e8e17e2a1c248c230cef462d49bc0a705ae0d2 SHA-256: fbc9d6cd8bdcfbcd2db9590baeb98eec6afcb05b2ac951a3fb47439bef2aee24
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-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
  • 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/strik?utm_term=how+do+you+reset+oil+life+1999+honda+accord PDF link annotation
    • https://zomubotedop.weebly.com/uploads/1/3/0/8/130873922/99535c402.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/94385525270.pdfIn PDF document text
    • http://bejogodajis.22web.org/acknowledgement_for_industrial_training_report_civil_engineering.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/analog_and_digital_electronics_free_download.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/8977632.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/wanasuvedigo/aashto_method_of_flexible_pavement_design.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/vesoxenepebobudojetixegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cdd1b5c-f12e-46b9-8ce3-248b248b3937/99102359837.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/what_is_the_purpose_of_convict_labor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04400c72-8ac5-4179-8cfb-731c0172fd43/bafonedokos.pdfIn PDF document text
    • http://nilevividik.rf.gd/aide_mmoire_mathmatiques.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/charles_atlas_dynamic_tension_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/hp_officejet_7110_wide_format_manual.pdfIn PDF document text
    • http://sixosotonipo.epizy.com/funowobigome.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/fidavudulolumujojadokuti.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/what_is_a_good_meat_slicer_for_home_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc844a35-ec4e-4dda-adc2-b234250a17c5/13286014865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d97e38-892d-4ae2-a230-37b2db78a985/rados.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/no_game_no_life_light_novel_volume_12.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/definition_spreadsheet_application.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 5472 bytes
SHA-256: 97bea23673e10f97454d2dadd4069373c830fc3e4c7ad646fcbda8a215952b45
font_01_sfnt_off00012006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12006 11532 bytes
SHA-256: 9fe978ce7db8b45649f41426bc8d5a39b4191d69ddfb376c541e1bbd4ab4d8ba
font_02_sfnt_off00014763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14763 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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