Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fbecec56a21b39…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 14:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d7175525c522f384bd56530ee29a26f7 SHA-1: aa6ceb47f339db1522e521f1de6779ba978f2efa SHA-256: 47fbecec56a21b391a1ccb378c30691bbd26e80dac9026f8d127d32c3ea89ccb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and is identified as an image-only document designed as a phishing lure. It presents a screenshot-like interface with a clickable element that redirects to external URLs, a common tactic for credential harvesting or malware distribution. The presence of numerous links on disposable domains further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tndvn.com/js/ckfinder/userfiles/files/mezinokalololenegipagixeb.pdf In PDF document text
    • http://unsersohn.com/images/file/92685042098.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/58952552823.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/29865316266.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/5488854618.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/wejanesurogoguzategubonup.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/vupipi.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/36657729669.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/20219193820.pdfIn PDF document text
    • https://scalping.ir/data/files/file/moluratajuxijasukelego.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/zosiroxumelog.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16154384d7afff.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/vijujozukuravexekofa.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613468e767af6---57477887823.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/manebisatib.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/82251025006.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/80358813020.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/31751535147.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/91748276281.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/10074898543.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/35249908820.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/zikuruzevijabowuladita.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/81210460440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+pursuit+of+happyness+torrentPDF 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_off0000af49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF49 14184 bytes
SHA-256: 6469fe74713eec9a5428872094819f638340f4eb834058e9844e9090af7b5aa6
font_01_sfnt_off0000d22c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22C 10588 bytes
SHA-256: fb3913d6acef01f2d07bc91953bc8844482c89892ee446d81aa55d4b50c51e50
font_02_sfnt_off0000ea5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1