Malicious PDF — malware analysis report

Static analysis result for SHA-256 900842cb02384c7e…

MALICIOUS

PDF

74.7 KB Created: 2021-09-03 05:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 205a318f6612bc1f03c895a0c5b91500 SHA-1: 09702b59dcbf156b5bbf71b61bf20c1f729fabe2 SHA-256: 900842cb02384c7e15401e9dde5775d556e393d5d1b4f7702c109c490d04b65b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3fc5d63911f782e1fe8beb93c2a1e40d/9695212693.pdf In PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/mebarolo.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/bilov.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/71908502039.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/6e03afd4e913996fdb982914350015ca/davesewaxak.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/wijaxotelosa.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/nimijozetoso.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab15ec2b72f---luboguluj.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ad9devg24h0qqlns7d8jkv1qor/79124822018.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f71ae33d9---48765310008.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/4q33rbikhlm93i9a8kg51034kp/junus.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f41ee91dd---xodezak.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/85352244418.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/rokamupagoxigoxeru.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/16456910643.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/sulilumowodunuzalom.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dee41a43c---zoxujupumuxoseroras.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/32b656c12c801045fe518f5057bea542/1950450947.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/tujinazenazukipav.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16084213be6f0e---bufafoxuzojuz.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/25731125063.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/82286396357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=the+red+dragon%2Fgrand+grimoire+pdf+downloadPDF 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_off0000bda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA3 17796 bytes
SHA-256: 0fb465ab8530eb6679e2da12de4e70377c22e583849beb16cd44dae70dfb6a8f
font_01_sfnt_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 10764 bytes
SHA-256: 6a8b613de4603138a51d33b15a214c18d6dfcf0a9bf27332aa6d38b073d52cb5

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