Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5ebb03ae7b10aa…

MALICIOUS

PDF

102.3 KB Created: 2021-07-13 21:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ec990c1d54ec31d0fa745f3b935c49c5 SHA-1: 3bb5751c5d9ed1910b501bf1c02c5b9caa1690a0 SHA-256: 5d5ebb03ae7b10aa00a52a8822d198c374aaca8e9be981104be92c05bd6d1b2e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document serving as a lure to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/22gfci2e7nc52is79ipea6icqp/tipukom.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160ab87fb9956b---medizukifexum.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/37c7a3c5f926d10c24ef2632bf443bcf/87125599589.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd720c8c002---puvafijibebumuzobef.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a06c40e54e27e805a16b420173f09197/51129680111.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/miradiwavipew.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fac801ef5---mofawi.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///68288520853.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/malh506bufo96vc6dennqkmju6/24332124558.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/8uj2nbtoo4m16rguolkd5f4qgm/jubazulapefupitalovofus.pdfIn PDF document text
    • https://arerp.kr/data/file///39491001308.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gbt3dobafi7km9c8cg53m7il2b/jubigobamagokabupe.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/vafunapafizixovunug.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9736978ab---54187837012.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097671610ad2---91203895182.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/55039588382.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/3036957410.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a7af9ae53---nuwezudixuwuwojoxulev.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc82052b3c6---mavof.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085750054002---74791934166.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-7/20210507124626774764.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/12201001976.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/dokuxotoroxefivojuzosir.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608074c5ac1b4---17834960488.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=emmy+the+officePDF 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_off00012e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000146a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A3 17876 bytes
SHA-256: 8029d250fb15856242a59a5b8ffc2e67f86353928cf0892796771a40305d0ccc
font_02_sfnt_off000175c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175C6 10120 bytes
SHA-256: ea3f51ac09eeb609d6449d223b60a9c5218dcf6f2cfda1fbddfcebdbf0eca248

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