Malicious PDF — malware analysis report

Static analysis result for SHA-256 d913089fda572844…

MALICIOUS

PDF

85.0 KB Created: 2021-09-12 21:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c0f71601406e1fae5bc1b00979cebbf2 SHA-1: 74b4ff1d77b36566ff2ac52235fb742e5c66ad42 SHA-256: d913089fda57284405f1feda86308b41a77573fc6ed8863062a755350fbdfbc6
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent. The embedded JavaScript and URI structure suggest it's designed to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/30245585765.pdf In PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/dubajogutowijuxomo.pdfIn PDF document text
    • http://szhlfz.net/upload/dudigobedax.pdfIn PDF document text
    • https://kildevangen.dk/files/sizimaregufamid.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/5245996865.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/63202701760.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/woludepin.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/36177948674.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/25391654117.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/99284450872.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/zopazetu.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/72087824761.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/52667680299.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/bumanolaliwisuzodereta.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/16079401675.pdfIn PDF document text
    • http://unityproductions.com/upload/files/kuxupenoneji.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/rizijuzevojasinogumuru.pdfIn PDF document text
    • http://sksound.com/userfiles/file/dibevo.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/81903310008.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/65140795867.pdfIn PDF document text
    • http://wohntraumgmbh.at/gabutanalo.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/delotamudeladamekiwemenez.pdfIn PDF document text
    • http://exim5.hu/_user/file/79172806717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tips+and+tricks+android+11PDF 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_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 10436 bytes
SHA-256: 9eee50651e6708e833a1c4257d1c6c0d2085a13f4ed9910b1069fb38705bb0de
font_01_sfnt_off00010145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11957 17504 bytes
SHA-256: 7f392edc2df502ff259e6dbd9649017a97bbd8aa3b9b157b05bee42d0d2163a7