Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ab2036b1a2db9e…

MALICIOUS

PDF

70.1 KB Created: 2021-08-06 21:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d0f7d0d3f161b13f5ba5a27fb4b2e0f2 SHA-1: db9065b91958d97d9608932f95bfcb84ee9df054 SHA-256: f8ab2036b1a2db9e42aa245b486cb760dbc60eb974147d0ab3af53ec61bdc465
176 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document with a clickable action, designed to trick users into visiting external URLs. Multiple URLs hosted on compromised CMS platforms and disposable hosting were extracted, suggesting a link farm intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://generale-bureautique.fr/gdb/files/file/mosizapabejopovagupurov.pdf In PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cf3eabc90---latube.pdfIn PDF document text
    • https://songhong.info/userfiles/file/kigopaxadivu.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/nasetotevotunagani.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/3c44849c1d2322e2d873d412c246d42a/47185887907.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/8547836513.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f10418d25---kazobilakarewanizixosem.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e8fb97a16526ef24207216bbfdfda16/geminaguzebomibuxus.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9e6bd9c5---mosiw.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1d6ecb6763---45046851934.pdfIn PDF document text
    • http://pololanna.com/user_img/files/kuzuzuzowovukafixakuzibi.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d224ae3ccf---62835849142.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/jljh5n6ih34082gr94nue6c2h6/lefoxe.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/zasujedalunoxudalo.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/jatigonozujatir.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/56880358927.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/18040761915.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/zupin.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/20938798810.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4636f498b3---87156963493.pdfIn PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/6229268194.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/71272969157.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc27e6169---59165619313.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a923548f82---46766939486.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/nigewazuke.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/28013192142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=anaconda+2+full+movie+in+hindi+dubbed+hd+watch+onlinePDF 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_off0000b453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB453 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6A 10968 bytes
SHA-256: ef63ac7126aa9e4ff33c5ab723ef0bde5722372bfb13165fbea0f6fb5ba3cea6
font_02_sfnt_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 14120 bytes
SHA-256: 7e505eee0b181cbfe4f16dee153c512ee96fc84937b9682b649eb2a15912212c

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