Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeccd78f7d22055a…

MALICIOUS

PDF

71.9 KB Created: 2021-06-12 17:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e9484e5c38b2f5575199ae3fa0b10c46 SHA-1: a93fdd7a2a6ff53ce28ece53cbcbcbc1c5936f94 SHA-256: aeccd78f7d22055a5f78cdd9d8556f87cab092603beeb10b8e7389a0b6bf6fb8
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm. It contains numerous external links, with a primary lure related to downloading Bollywood movies. The presence of multiple external links suggests an attempt to direct users to potentially malicious websites or download further payloads, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://inwebjor.ru/pbw?utm_term=new+bollywood+movie+download+480p PDF link annotation
    • https://jipunone.weebly.com/uploads/1/3/5/3/135349916/2f43a58a8c273e4.pdfIn PDF document text
    • https://sabigakubotel.weebly.com/uploads/1/3/2/7/132740275/df29471813920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480589/normal_601b9e68d5a43.pdfIn PDF document text
    • https://mitadelo.weebly.com/uploads/1/3/4/7/134712934/459b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_60150de9a1dd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radejaki.pbworks.com/w/file/fetch/144766884/analyzing_the_effect_of_ph_and_temperature_on_enzyme_activity_worksheet.pdfIn PDF document text
    • http://wekibivu.pbworks.com/w/file/fetch/145015782/lone_survivor_putlocker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33179fc8-c464-4913-8b86-1735cebffea6/dsc_1616_trouble_code_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54469ec2-d31e-4b70-af92-2cdb7d4f666e/catia_tutorial_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489d91d5-42cf-4f3e-8618-b8ebff7d68a9/setujudusunekunaxivuro.pdfIn PDF document text
    • http://paditoxef.pbworks.com/f/heat_and_mass_transfer_data_book_9th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee9e1ec-5b24-40e6-b96e-563e45259efe/sipokikarerebipaweve.pdfIn PDF document text
    • http://namikikis.pbworks.com/f/76843024370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7eb225-f7d3-4741-87c4-6b2dcbfeb8ca/63087746594.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144512670/blackpods_user_guide.pdfIn PDF document text
    • http://wonivefuruk.pbworks.com/f/film_veer_zaara_full_movie_with_indonesian_subtitles.pdfIn PDF document text
    • http://detomipipu.pbworks.com/w/file/fetch/144500397/zapidaronog.pdfIn PDF document text
    • http://papoxuva.pbworks.com/w/file/fetch/144422157/koreforuvopawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b57eb01-5d36-4878-812c-fd440e7c638d/mathe_binomische_formeln_bungen_mit_lsungen_klasse_8.pdfIn PDF document text
    • http://feselikebapu.pbworks.com/w/file/fetch/144786243/pinefivarekuv.pdfIn PDF document text
    • http://ropotupi.pbworks.com/f/daxafa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 5620 bytes
SHA-256: c7d12f1da281f365db7b906d66be9030dc3f75cbcc781f8fb7d1fd47d0336420
font_01_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 10936 bytes
SHA-256: 0df1070387a5a25ef417cac4a5d650cc86f41f3a6ef7c38838dedcd441f854c3