Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9d9141c5c765b8…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 00:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 054269e4b4d5af1dc23be99da12532d7 SHA-1: d4d6bd73c8b2a3289f94e7c24b8128aff3255074 SHA-256: ed9d9141c5c765b88819b3d1184d8d6bc1286a896c45f9b8cdba6b1f892a0ca0
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to real estate loans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/123?utm_term=report+echeance+pret+immobilier+credit+du+nord PDF link annotation
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/9977e785f.pdfIn PDF document text
    • https://kipidabivipili.weebly.com/uploads/1/3/4/3/134340994/53ce37ba84.pdfIn PDF document text
    • http://bossyonlinex.com/stock_exchange_open_on_veterans_dayprmub.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/thc51jc/my_airtel_app_nigeria_download_android_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/vijlohh/dudifewamevoluluxew.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/gjijjDd/85416373950.pdfIn PDF document text
    • https://cdn.sqhk.co/nexupumile/eUiiL7P/26560330543.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/iX5L2ji/seven_letter_words_starting_with_s.pdfIn PDF document text
    • https://razebefalokugex.weebly.com/uploads/1/3/4/8/134895215/fuwedametesu.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/1de2d883e2c.pdfIn PDF document text
    • http://belldiscount.ru/tukisitukafovemukg.pdfIn PDF document text
    • http://fb-copyright-help-from.com/brinkmann_stainless_steel_grill_toppercesrh.pdfIn PDF document text
    • https://cdn.sqhk.co/rinulazopun/gdjbIjd/68738777060.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/jbjekhh/84092693415.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/8ca75d77-54fc-4d4f-8573-50de89f3f101/kefexubavijajize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59ff8c8-7f94-4f4e-a41c-fe62adfac5a4/how_do_you_factory_reset_a_amazon_fire_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c317d5c-e085-4710-b7df-1f4178b2c16e/zagonagigofabalaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45456fd-c9b0-492b-93c5-fe1187019462/what_is_a_waste_product_of_aerobic_glucose_metabolism.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_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 5280 bytes
SHA-256: f1fbbdca8d94b49cee4bf108a20fb90149a0533766d1bc9290ea4f1a8650680b
font_01_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 12252 bytes
SHA-256: 1ba10448911e84eb740300ae342a0072a23a593628d2134b1f3a208f4ae4d872

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