Malicious PDF — malware analysis report

Static analysis result for SHA-256 e611034a68fffa86…

MALICIOUS

PDF

84.7 KB Created: 2021-06-10 13:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 27cefcea3af12cb9d922d7f24fa17b57 SHA-1: 0d9ba01ea0b9dd84095bd58adf25405adc93342b SHA-256: e611034a68fffa86c3e97629a664e55fc8747fe218b6afbd52c7073197f43e65
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9985

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/pbw?utm_term=thai+subtitles+for+english+movies PDF link annotation
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/8884168.pdfIn PDF document text
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/lemivunazorexo_juwodarewivi_judejiki_doxegigapaxaxar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_6022e7c3b4167.pdfIn PDF document text
    • https://sizuxemonip.weebly.com/uploads/1/3/4/3/134315948/leruni-napinipijogofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fd13d2a3626b.pdfIn PDF document text
    • https://sosepokapebovi.weebly.com/uploads/1/3/0/8/130814645/mewiwagitolafudolek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_60695f1f07eaf.pdfIn PDF document text
    • https://vatuwogumim.weebly.com/uploads/1/3/4/6/134605764/9047b3f768d79.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/rabupepamo_kuwavodow_bevimufuruv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144602121/how_to_assemble_ingenuity_dream_and_grow_bassinet.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144868752/mctv_barbados_tv_guide.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/f/39923923446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf88206-83d8-443c-9a78-3a8c290e012a/design_patterns_in_java_tutorialspoint.pdfIn PDF document text
    • http://mifudatu.pbworks.com/w/file/fetch/144995730/52512171852.pdfIn PDF document text
    • http://fepazonavu.pbworks.com/f/95517068580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55c06fb-af1d-41e7-b08f-19ec99a95fbd/sample_letter_of_recommendation_for_vice_principal_position.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fd9b2a-345e-42f9-9fb6-c6ba961ac0cd/plantronics_wireless_headset_charger_cord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86def711-e926-425d-9bcb-40fedf1abf21/79414647677.pdfIn PDF document text
    • http://lokuwulixit.pbworks.com/w/file/fetch/144873729/epson_l380_adjustment_program_free_download_full_version_rar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afc539e-0893-4f71-b4cf-3217b01d56f0/ledemu.pdfIn PDF document text
    • http://kekirow.pbworks.com/w/file/fetch/144636870/lememamefatoki.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/pokemon_light_platinum_gba_free_download_for_android.pdfIn PDF document text
    • http://wenumizelug.pbworks.com/f/daikin_vrv_catalogue_2020.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 6692 bytes
SHA-256: 3cfd6710d1efe4033c604dc0336f4f91733892a0dbf351ee30e487ef6c2edd27
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 5332 bytes
SHA-256: cef077d6ad2b1d2b72025d555382f468c700294b275c05769268fbdb3aed5526
font_02_sfnt_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 3820 bytes
SHA-256: 1adb32accd2f278bb43f83c804edb260460b51300647976be3494d1172fb60ed
font_03_sfnt_off00011fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 10328 bytes
SHA-256: d0cbe99e00d1debeb08a6a7b9632508d5643c42cc1ca054b3c4b4344ec80d45d