Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a54f55bd66443b0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 02:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: be150d5faf50d1209afe9ba2c8b762fa SHA-1: 79aa7a4155f1c750ee7143bbe0f7f9dd717b987a SHA-256: 5a54f55bd66443b020b721d1f35ff48e66e2ded5ccd03be6300203c8f004073e
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains multiple heuristics indicating it is a link farm and a lure for remote support tools or callback phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam attempt, likely involving social engineering to gain remote access or extract sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/djfv1a4nqvq8v0gv37kf3kg7r6/lusifebovexa.pdf In PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c36a9a63baf---67329209638.pdfIn PDF document text
    • http://gabortech.com/admin/file/25974126040.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cdb59747---72273473609.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/74076628298.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9342b3a0211080a59b45c997741ef554/83158544761.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/kozatilugagarijuxajer.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/96ec768f07ac9a3012f2b809daa25aca/26350069776.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/wasaxoro.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/susilabalamutoxa.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a0fed2186911f271dc84e58f1f2d1cc8/93552006727.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/26803134713.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/24760130104.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/nulebakuze.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/48272895721.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/85229959954.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/so84c2v5guhrrc9h6qqi9ci655/jidit.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8a38fdc3e5de3ffe8db3b2df4fc13f32/33340730913.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/8od5uacpkdmc9rl5kl75nd5vt8/38420017102.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/pakisawirabesajaze.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/b9686f9309010e6502428271f56897ec/34120954831.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/2202185317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=reading+comprehension+worksheets+10th+grade+pdfPDF 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_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 17616 bytes
SHA-256: 6c096d888330b7ba6cecdcd18d65e4d7324b16b893d7553c3374678ce597162d
font_01_sfnt_off00010cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 11420 bytes
SHA-256: 8e446698a134719d33c86e889ef50698213175fa1f57788f897dc5ad9985d79b

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