Malicious PDF — malware analysis report

Static analysis result for SHA-256 a426c89bd12ab60f…

MALICIOUS

PDF

69.4 KB Created: 2021-09-24 20:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d4c5a34ea4f4cbab75e4bc8e7604ce8b SHA-1: 779641d2e4a1db4efbd2eae9b4ea12fe80419f62 SHA-256: a426c89bd12ab60f423c80cee23faf4ac6715263da4105ddadf813e27841167f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is 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 installations, suggesting an attempt to redirect users to malicious content or phishing pages. The document's structure, with minimal text and a large image, aligns with a common tactic to obscure clickable elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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 69 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://smidgel.ru/uplcv?utm_term=the+quiet+place+2+full+movie+watch+online+free PDF link annotation
    • https://bandai-k.com/userfiles/file/15095034761.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ql4ir3mcj6oganugamsi58q4bm/86780029049.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a2ce39ff7d5345d0a70e11c17201ec1a/32826422566.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142dd7d3f87d---bomorazisezitive.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/lupawefijenenokinonuvu.pdfIn PDF document text
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/99075143009.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/zidaxewipavawudisofesobe.pdfIn PDF document text
    • http://hadt.vn/upload/files/tozixozuk.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/86430353763.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/21800165609.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/rawuwoxuturexudijeb.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/kowenipilosipivenematuda.pdfIn PDF document text
    • http://www.moyekolodin.com/files/siwedupogitakeza.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/taxuwepikisananesut.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/4789346396.pdfIn PDF document text
    • https://birudongker.com/contents/files/derozegibura.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/kejilemebujedov.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/verolivamufipo.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/rekopezelomumisovezejule.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/besuvebo.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/jarowidaf.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/99236874586.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fed880b50---42391201943.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/sutolatadibuguruw.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_off0000b272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB272 14232 bytes
SHA-256: bd996ad40dc6ba1acba44ab482581e072bd6d8f13096389c7c3f3d7ebcd46768
font_01_sfnt_off0000d5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FB 11056 bytes
SHA-256: 3364bb61fb2d57c10574db9000af13ea90dbdabc2dc70c9ab0aa406a398579b0
font_02_sfnt_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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