Malicious PDF — malware analysis report

Static analysis result for SHA-256 f290d2b27580bc37…

MALICIOUS

PDF

83.3 KB Created: 2021-04-05 10:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9eb054ba9cf5a56d9a59265d7454455 SHA-1: 7075760648ce750a010dd38db341a82ed095b89c SHA-256: f290d2b27580bc3787cb4813e49310480ef759b28c1dbca806befdb405b8c70f
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 0.9967

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://ponafet.ru/wix?keyword=star+girl+game+walkthrough PDF link annotation
    • http://jumbochecker.com/bharathiyar_quotesgzmtt.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/ninekarimixurakisumug.pdfIn PDF document text
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/sepimomivup-tivijerapul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385021/normal_5fee923e9d2fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_600c00eb2cdf4.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/xubanuv.pdfIn PDF document text
    • http://webcam-model.online/816383737601jhcc.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/how_many_drills_can_you_miss_in_the_army_reserves.pdfIn PDF document text
    • https://fufigejopugip.weebly.com/uploads/1/3/1/0/131070204/2590786.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/85507102069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_600019c3f01b0.pdfIn PDF document text
    • https://fomemavinujidi.weebly.com/uploads/1/3/1/4/131414297/7a6fa95.pdfIn PDF document text
    • https://tasuvuka.weebly.com/uploads/1/3/4/1/134108605/2486758.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/phonics_blends_worksheets.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/winchester_ballistic_chart.pdfIn PDF document text
    • http://digitalmedialit.com/how_to_write_on_file_macbookldrxz.pdfIn PDF document text
    • http://tavegumata.sportsontheweb.net/production_of_acetic_acid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470027/normal_6003e6713f6d9.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/11994898082.pdfIn PDF document text
    • http://bristol-yalta.run/sifelixidapozarijapagolu3o23e.pdfIn PDF document text
    • http://top-odejda.com/sharp_aquos_lc-60le640u_will_not_turn_onkgoxj.pdfIn PDF document text
    • https://zaduguwage.weebly.com/uploads/1/3/0/8/130874015/punibimisemuwuvaso.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/veledabejufi/accounts_payable_sample_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/4_hands_piano_sheet_music_easy.pdfIn PDF document text
    • http://damowepoko.myartsonline.com/nitutetarivi.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/rb_leipzig_fifa_19_career_mode_guide.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/zerodha_varsity_module_9.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/the_series_of_unfortunate_events_genre.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_off000108e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 5180 bytes
SHA-256: fee7ffff1a1f761d8b3f1bfe5d44db42bfbc100ddd9dc6e4a70c543e7bbd935f
font_01_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 10832 bytes
SHA-256: 39fbe611fcd8b2c74ace3e435e7a30b5fd07730bbf32040e05aa366c6041174b