Malicious PDF — malware analysis report

Static analysis result for SHA-256 945d516e4e8d8a3d…

MALICIOUS

PDF

130.1 KB Created: 2021-03-08 14:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5cb8e1c2166646020e953966a94212f8 SHA-1: 962a1dfdbbf83c87e80a61af047ac0832464a185 SHA-256: 945d516e4e8d8a3d049229455ca5bcbf5545b57013e496b66e1396b47dedf176
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 0.9990

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://jottigo.ru/award?keyword=android+studio+animation+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/xogixute/ggK6Gha/jamativiper.pdfIn PDF document text
    • https://giridoxaxe.weebly.com/uploads/1/3/4/7/134703098/fosiwozod.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/taijiir/d_day_history_channel.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/cien_aos_de_soledad_resumen_corto_yahoo.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/9819246.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/where_to.donate_used_toys_near_me.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/8890940.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/65973814740.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/best_comments_for_report_card.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/58122515995.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/furinno_abbott_corner_computer_desk_with_bookshelf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_546ea7fd644a48f387cb661043466c6d.pdf?index=trueIn PDF document text
    • http://vakifavu.onlinewebshop.net/rwby_ruby_silver_eyes_fanfiction.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/loveledup.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/stock_market_veterans_day_2019.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_05f28b025a844f3097b1dd98001a2d92.pdf?index=trueIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_4ff03e8a28a141c58f6e33e586a0a0b6.pdf?index=trueIn PDF document text
    • http://noratev.myartsonline.com/33583893403.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_0d43af35772c4a73b671d331cde0a100.pdf?index=trueIn PDF document text
    • http://pabotojixupi.atwebpages.com/us_army_uniforms_wwi.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_7627f6eb26814692b674d74f8c8d6738.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/volume_of_prisms_and_pyramids.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/74821234562.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/how_to_change_decimal_places_on_financial_calculator.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_off0001b3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3AA 5176 bytes
SHA-256: ce803f6ab6c03269a4dbd6ff072279497e53f1605adb7ab1fbff9e502e3f9f44
font_01_sfnt_off0001c531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C531 16920 bytes
SHA-256: 3f0d160fdad240299d306b545f1c515590faa1239eda33de286332785871e10d