Malicious PDF — malware analysis report

Static analysis result for SHA-256 87324b804016e138…

MALICIOUS

PDF

82.1 KB Created: 2021-09-23 22:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cf5d048f15efa57596c2ddfdeef78108 SHA-1: 964797a9950f090c1340a1c8e0a675de425b19e0 SHA-256: 87324b804016e138a2c5fecdc36d97cece5dff962028f9038cf4afebdefc927f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through phishing or by serving further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/a32dfc34f25190eb049b388d927ca5e1/bagogewezilori.pdf In PDF document text
    • https://dichvuhappyhouse.com/upload/files/82888226289.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/jajimibijavarabenof.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/73827104143.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/tiner.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/190e0ae299eabc93c028606845c48186/jujuwejiremo.pdfIn PDF document text
    • http://isgsrl.it/images/file/vaboximumitekopotubux.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614955a757da1---gubibubezokataremujiguf.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/75fd0661e8cc64b18fbc323e8b24e8f2/12989080918.pdfIn PDF document text
    • https://ikima.fr/uploads/file/42867965946.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/wezumufibazuwirogitinezu.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/nadoseko.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/97838374551.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613426c28a84a---rusewatus.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/14730034112.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb75f37810---33749892931.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/43526584634.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/vafaxotorono.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/32440594417.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/jupawejenezibarasegosifew.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/napevovadupuketotenikafik.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/98846152902.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/54637682619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=zubrick+organic+chemistryPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 11040 bytes
SHA-256: 6b98b69005cb553e0c131497358e9ef60091299e4234084dac62222b3381ac53
font_02_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 18164 bytes
SHA-256: 76ab1685d1245a4b6c7b3aaa6f4b23535d08a875215190d72798c61fa255eadc

Open this report in the interactive analyzer, or submit your own file for analysis.