Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad09020688da5f0b…

MALICIOUS

PDF

81.6 KB Created: 2021-09-03 23:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cf8388689e9d32e715c90f3bdc555093 SHA-1: 804620af01badeb50cea91f3a98d188a6d0d1732 SHA-256: ad09020688da5f0ba30a2c0d0d6b148e1a2c10e516c52465737f46eb1adfe80f
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The file's structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b421166f7e---buxigiroxerojanis.pdf In PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fd98651ea---debirevenonetivuxu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f226355a42e0d23262fe4bc735411eef/dowukezekuvusela.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/wirezikiloxilusi.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/bf0889b801e497f9fefc2ecf3e2a72ca/57949096343.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/lupiluk.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210713_5A5304F63F663376.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eacdc74d0d---8014887891.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a35255617c2---sozurusivunuzadubuda.pdfIn PDF document text
    • http://ge-mak.com/files/jeratagesizulesupuratexem.pdfIn PDF document text
    • https://coil.hk/upload/files/beduxagejejikoretitadet.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba3fef9ac---nasoziludoxumufosi.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/xadidotinozomaramud.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/jabed.pdfIn PDF document text
    • https://majubesar.info/contents//files/butoxasazuje.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b28630d9ae0f3793b7a45e6742a845ec/50504495800.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/faxidigogajogafa.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/sirujerilimawa.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/4417678820.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/63776414913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=weather+forecast+british+council+pdfPDF link annotation
    • http://medlab.webd.pl/upload/file/gexaveja.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_off0000d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD777 10948 bytes
SHA-256: ef1047c753058a418de00964db3c1a3d8979916e351d3b3173734068e74d17ad
font_01_sfnt_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A1 18692 bytes
SHA-256: 698c3dd4a1c5e58845eec1b2b4966d4ecef7c8ff6f55dd98d7a88f30c6d926b6

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