Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4e9bc7baa61862…

MALICIOUS

PDF

89.9 KB Created: 2021-08-18 10:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e008d130e2284c45a40d67ef0f116593 SHA-1: 57e24322cedb89c13012cd11a9153133ba7ae155 SHA-256: ff4e9bc7baa618626ac5dac0a44361b49a267f1c65eb62d3323501925ff655a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/49poh6lqjclftblat13np67uem/nakum.pdf In PDF document text
    • https://dukra.sk/editor_uploads/files/kolufudemawod.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/84312974648.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021713425209315.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/20299849780.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094abe18a82b---89832156938.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/uf772kgnv4ao1sp4r710j9rbi2/pufutijuvowijunidefivod.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/842491123d47351ac3cf65f72af41e72/muzizo.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/70473701181.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb910bc2730---kituwajibos.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/wixeluvijolofar.pdfIn PDF document text
    • http://nfc.soo.jp/file/jekenapevemibomixez.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/wowopibikimexamejudujopab.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec424b4b80c---xinezak.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608252b42bf94---rijexaremeromupolujisux.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc437b7f6b---57862098497.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/rijajirekatetusagago.pdfIn PDF document text
    • https://www.neosynapses.com/wp-content/plugins/super-forms/uploads/php/files/6cuuj30nbr5324rplg6g3c6pct/vepobotigi.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106141109.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19899e8c1---bogawapaxuritifetutuzoj.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/37004863645.pdfIn PDF document text
    • http://aimic.com/userfiles/file/23546854788.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/93287290341.pdfIn PDF document text
    • http://mp-journal.com/media/file/kilizurijoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mini+militia+doodle+army+2+hack+download+apkpurePDF 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_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 11116 bytes
SHA-256: 1c2db83f7c720756f757e13cff3c3130b1cd0b97b4cfdfcd54480d7453cfa2ca
font_02_sfnt_off00012b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B10 17020 bytes
SHA-256: 8c458cfb565ee7d23f9c25286a8531097255c7003ce65f87588307cc87dbe47b

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