Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97a0ceebaebebbe…

MALICIOUS

PDF

76.0 KB Created: 2021-06-02 20:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0da49ecfde83f2d51442e3879a03ffd9 SHA-1: 73270ae29b0d9767f1ef3cf845b46d29f4ac6679 SHA-256: f97a0ceebaebebbeb5da11c77648f5b34d7130dbab8568882edd51b2e8b795c6
186 Risk Score

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 0.9991

Heuristics 6

  • 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.
  • 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://oniceh.ru/pbw?utm_term=how+to+solve+colligative+properties PDF link annotation
    • https://tudaxuvogune.weebly.com/uploads/1/3/6/0/136082380/ganugewiro.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/0fa4304.pdfIn PDF document text
    • https://lopekemin.weebly.com/uploads/1/3/4/6/134628767/8917630.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/texafidakerup_pavimilib_nasaborexosomig_tonuma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45b39a9-d9ff-4ad0-83b5-0e33abdba693/difference_between_dna_and_rna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d1f114-78eb-4d77-b374-e078a1a4e312/87821970150.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144476985/vakavozigibekupamibuzon.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/f/pros_and_cons_of_tax_relief.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b32bc481-8a68-4724-a690-23675109cb00/69208664617.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/mercruiser_service_manual_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215a8635-8069-4c87-981f-224a84c80830/how_long_is_maternity_leave_in_the_military.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651a649e-7ab1-407a-a533-a8a3e3fcc21f/jcpenney_associate_kiosk_resignation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a219b5-a8f9-48c9-ba2c-f75b7722ec2c/dutap.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/w/file/fetch/144470592/full_body_cardio_workout_at_home_for_beginners.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/what_is_the_thesis_of_the_essay.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/58964870384.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/new_tamil_mp3_songs_free_download_123musiq.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/w/file/fetch/144497163/what_is_the_least_intelligent_personality_type.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/exercice_pythagore_3me_brevet_avec_correction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0074637c-eaa7-4d36-8081-6418c06209b0/7.3_powerstroke_automatic_transmission_4x4_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41025b72-e4c2-4be6-bbd9-4ce95dc23c65/is_sword_art_online_a_romance_anime.pdfIn PDF document text
    • http://barumena.pbworks.com/f/tasuliwejowadilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d01667-2d66-498f-8d55-445149c8a64b/ringtones_download_mp3_telugu_songs_naa.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/f/70731933502.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_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 5212 bytes
SHA-256: 3fdf000aa3d84a7a8961580727eca6c0a5a879f441046014f45b60a8a4d8beaa
font_01_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 10432 bytes
SHA-256: 009370015831026f5c05079e4c011131386fab972d361fc370717a03d397f247