Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7830eea074be329…

MALICIOUS

PDF

80.3 KB Created: 2021-09-01 07:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6c6f5d44a0ba63ee6ff4df28e07cdb65 SHA-1: fed17f1b8c85af02043c2eae91076b649fb887a0 SHA-256: a7830eea074be3294f21da58dd1ecaed4431fd3a2e147f8e7b6156ada34c4cd6
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The primary intent appears to be directing users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/n1oct7be9svat80gmt2mh7qq28/90583485060.pdf In PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/pomadumuxusukupuli.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858b2558625---moxitadaxa.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609049c5e61dc---vogokadaxilujo.pdfPDF link annotation
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f945018973---fokomoraresobuzizori.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021071704571493.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/11849467736.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ad965bc8a04---kanatufubupaxevopurino.pdfIn PDF document text
    • https://aromamarketing.md/img/files/98403725252.pdfIn PDF document text
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/gixexawovene.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a595bc19---83559372910.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/1334791039.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/76697659628.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/49126801089.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/92870927576.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/38736852822.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/74550216927.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/7f5b83dede8996f9ff952bc62d93eb86/35420929936.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c218dc13f24---81044555199.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/78041273050.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/ragexixivofedapov.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/56115244972.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/mafudefoberizu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dedc15a5dee---tedemosejegobitesi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=pluckers+south+lamarPDF 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_off0000d1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 10492 bytes
SHA-256: 95df0ca8c0421a15c4aca02f96e8998cf3f1b2a76e6f9eb6ce443ce2be1b5f0e
font_01_sfnt_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 18268 bytes
SHA-256: 640492bfeeccc572daa61c4b9486e7eccb31c130a87206ddb11bf5f1867aca50
font_02_sfnt_off00011947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11947 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1