Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dc071bc9cbb74e…

MALICIOUS

PDF

80.4 KB Created: 2021-09-24 10:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8eb9d80a2ddeb6552d8406d7a0fc0f33 SHA-1: 5de72e5bc48888c5e5207a1052ee82e1c8e3dde8 SHA-256: d5dc071bc9cbb74e0c862cc7f04438ef26680e8b1ad13d79c3988137a600f1bb
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm and a QR code lure. The document body is heavily obfuscated, but the presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a phishing or malware distribution scheme. The primary attack vector appears to be social engineering via a QR code prompt, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://botosani.ro/img/uploads/file/71828917166.pdf In PDF document text
    • https://et-auditing.com/userfiles/files/nupodanibiwekaxul.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/goxeriwinevifubudinefazat.pdfIn PDF document text
    • https://onecre.com/images/content/files/53796218516.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/071653453503.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/renunisomaroxokilokodofo.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/63645443957.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/50452896913.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/mexijap.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/9cfe74cf36e1d04b77a2e17712bb0cc0/65225944190.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/golabomowovesoseke.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/rojixa.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/ruxujadidigabud.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/62835461431.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/zivuvokaka.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/66910324288.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143ad82d5409---bekovetimijozokarozarum.pdfIn PDF document text
    • http://unseretochter.ch/images/file/44450731700.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/68599482820.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/rowugegomelaxozopi.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/tozoxisamili.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/43570077901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+scan+qr+code+with+galaxy+s7PDF 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_off0000d407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD407 11136 bytes
SHA-256: ade4d4f2e33eabad38767372a509153383f095d0a7244f9b1025fdccc81f20e1
font_01_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 18064 bytes
SHA-256: 8981aeb83d90e25120dd60b787c6bdc146d8ad543980ce1c2c6e7305041edf63

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