Malicious PDF — malware analysis report

Static analysis result for SHA-256 db18a882130e77b9…

MALICIOUS

PDF

90.3 KB Created: 2021-03-13 21:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 047c0bfe9979d7442398baa5041f5089 SHA-1: 93be14967305937c4c73db6724331d5bda6f0c4d SHA-256: db18a882130e77b94c99198a8dce2fe14c96ba5b271c1d7cd0cd617a855db2a6
66 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 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 0.9996

Heuristics 4

  • 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/123?utm_term=csc+holdings+llc+annual+report PDF link annotation
    • https://cdn.sqhk.co/fofateze/hiakUjh/xufebobosepezemi.pdfIn PDF document text
    • http://tarezirok.mypressonline.com/kjv_bible_with_strongs_concordance_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/piwuzuberaze/f2jfr30/marketing_strategy_ppt_template_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/1thhthb/50_photo_collage_maker_app_download.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/47727847830.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/jbii7LH/94911284763.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/dujakosisevi.pdfIn PDF document text
    • http://noziwop.22web.org/aviva_pension_platform_charges.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/polexebuj/38547098084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf621e44-bff3-491d-a785-6c888a68f2e6/7363241381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff04fb6-af53-45d3-bca4-cdf4d46d622e/wumimetimujitelibijenuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a30cab-0c6a-4689-ab67-92592712e3c1/murray_lawn_tractor_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566866c2-47bd-43c8-9ec9-e86356a39910/how_many_calories_are_in_subway_spinach_wrap.pdfIn PDF document text
    • http://fopevuvowixapa.epizy.com/catheter_related_uti_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3c1fee-867a-4ee8-a776-d044f7278944/gilutivazojixadupokalav.pdfIn PDF document text
    • http://wegorabeg.atwebpages.com/64081221391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938f7cf0-d98e-4e1c-acf7-e12ff74126f0/my_cousin_rachel_full_hd_movie_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37cf365-f7f4-49f0-8a04-5b1634d00695/fopupezekimu.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/54812166228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49184cd8-c156-4ee7-bddf-c2e14d44e447/47958621823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187b5c3d-7a8d-45bf-ba12-bcefbd47b69f/how_to_use_a_scale_ruler_on_drawings_uk.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/20859178845.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_off0001139a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139A 5240 bytes
SHA-256: 93903c713f08efe4a06a03e06f9a9b5fb5892f65bf0e25a1bfed1751edbdb194
font_01_sfnt_off00012564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12564 16712 bytes
SHA-256: f2521aa39cea5a5a058067af4f7bf8cf29f3ceb4ea928bb910807def9b48aefa

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