Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dddd5ed216e7f3…

MALICIOUS

PDF

79.4 KB Created: 2021-08-03 18:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9e4753972e47cca609a59aae42110e24 SHA-1: 638ccf4bb125c56fad49250850a0bba66fed8db5 SHA-256: 30dddd5ed216e7f3aa10980dc410ec1bd02bb30821421d7b66e14cbe0279e4b0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal One-Time Password

The file is a PDF that exhibits characteristics of a credential phishing lure, specifically targeting Multi-Factor Authentication (MFA) or one-time codes. Several heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a larger phishing infrastructure. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1b4cee6a2---garazukinolobozudabow.pdf In PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e60c2dd5d33f32bb53c059a2173e6832/15967350518.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/96277101553.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/goxipiminipile.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7288477543---jawejuv.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/tevazimiwofun.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/16466580597.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4f480c2ff---31039675475.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/19446308573.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bggsqd1qkolvarcjq4o4ssnpp3/votosofatelugomijo.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/241094e4661d433e937ec98560df2039/zekagaropole.pdfIn PDF document text
    • http://jaatkinson.com/userimages/muvasomerugonil.pdfIn PDF document text
    • https://haidangpc.com/contents/files/55435122533.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/pimovaluzimid.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/9fd40cc47d5b53bf012d6174506fe161/44798027928.pdfIn PDF document text
    • http://artside.org/data/temp/file/safudotapozixojo.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160941e9da78a6---siteka.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/zasipovep.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/9fe70417847cfb3a7e76049394bb12f5/49003761077.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/zekedozam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+get+diamonds+in+ml+freePDF 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_off0000d3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 17116 bytes
SHA-256: 1e267e364cf30f0b636dee0e4eaa3dba5c421998e5fceb15d0a8a1b4eb1e46f5
font_01_sfnt_off0000ffc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 10772 bytes
SHA-256: 1e7158aa1b01e49f8a78f75c7989208dd22e0415169e873a48ab26b92632141f
font_02_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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