Malicious PDF — malware analysis report

Static analysis result for SHA-256 27121045b160b4dd…

MALICIOUS

PDF

68.1 KB Created: 2021-09-10 11:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4b49441be90d0f270374306ef70ac3bc SHA-1: cae61feeb041c7cf0b9508312375e7e485d90ee4 SHA-256: 27121045b160b4dd4058c04fd8fafde49703901e72a493cf293279c86b98ebf9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The document's structure, being image-heavy with minimal text and an action trigger, further supports its use as a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 68 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 https://oniceh.ru/uplcv?utm_term=the+family+man+online+play PDF link annotation
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161345a7f132dd---mesekemezog.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/vokupaturato.pdfIn PDF document text
    • https://o-dance.com/upload/files/pesasopuba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdd8c08b25---27177803956.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/34313915996.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/48609985296.pdfIn PDF document text
    • http://vildmarksjagt.dk/userfiles/file/desapevavo.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/solowag.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/gosimofagemozitora.pdfIn PDF document text
    • https://trieurodata.ro/images/file/89141549831.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/sivevuxeboxakenepofisasuw.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396ca929d78---jisunonofeli.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/32677145032.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/xozijiwaxix.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/68308430314.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/86064632960.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/8df6a9a56e2ee811b569378317d0e228/salafared.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/3556140256.pdfIn PDF document text
    • https://motoralbini.it/files/file/larajufumok.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/vosavurebitidinapebadafed.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/kuvisam.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/nirozoselariwugemo.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/qep5f6u4jimo7hq5cj5ibjhuis/juzenewiserevote.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132bcadcdf6e---jogokumimoxaxurajolegi.pdfIn PDF document text
    • 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_off0000b1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B6 10336 bytes
SHA-256: 3f313a5350fb637786d8611ec28b098d21526015fb8461036a9d0e5c25e49b36
font_01_sfnt_off0000c8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 13904 bytes
SHA-256: d3b51ffb008a9a9054d8eef803f8e8f18cc568ffd2325f7f6220ed2abd4b1cf8