Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a047e0d0abeac3c…

MALICIOUS

PDF

92.6 KB Created: 2021-08-14 03:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d98c5cfc7e0e9447b39e38ad2ba632ef SHA-1: be2f2c7a9720ae89b1363511913a069cdcb3c4bd SHA-256: 9a047e0d0abeac3c24fce6e9ceb2afb281d2f61f0e18f00a77d5c15b3b9d5f12
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites hosting other PDFs, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these linked PDFs.

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
  • 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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/11fe9mq0e5blabomqsonlsit60/zesanajipurekanoxasol.pdf In PDF document text
    • http://peneleos.pl/userfiles/file/fofisefagogeridovimikob.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/qu6anvd4o7ac6qf2iohvq792l0/33052604051.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/sotewozagogab.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607186b826e80---mawomumidemotakumuduwa.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/dufoxoxonuragowuvusi.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d887a124217---bimazabozagepogutitij.pdfIn PDF document text
    • http://sun-eko.eu/files/file/30193623292.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48fa440951---35369003271.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/97915611628.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/31465c5b2a12910775c847697ebe0b7d/lemuzimilubifew.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609086fdc5d57---60451313815.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4159bba8d09f8fe45d1af002268ddd7a/73291640183.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/razixemonilimukalika.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/049229d46b08883e4a5e3fedf66c79e7/pinufomadavuxodon.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/79573507166.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/wibavesideredenawogegu.pdfIn PDF document text
    • https://kaisar168.com/contents//files/nuzipixaxa.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/b1823780588dd2266b2f163b434e94c2/90419593006.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102f7ab5b1ed---bofedapogekerirolu.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/99015200039.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/fc453d13be0b37acc9e316500ab9f602/68067038326.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/91146165373.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/mp6vlhi82imbgss9tdb8fd6aq7/51824805332.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210608103211_119793235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+beauty+is+light+in+the+piazza+sheet+music+pdfPDF 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_off000103e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 11224 bytes
SHA-256: 5c0e6f7cd3ad1a51c91a88263c9ae20a5117c3800948f2073359e5cf275f16fc
font_01_sfnt_off00011da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA9 17064 bytes
SHA-256: f14176f1cccf87d3d1796ed65a479863b716f2c02080e0cc05cdc06fc441b7a7
font_02_sfnt_off00014a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1