Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa07472071e69c4b…

MALICIOUS

PDF

66.1 KB Created: 2021-05-25 18:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 883a45b4eb5b92390760b43d604e93d7 SHA-1: 43daeeff8b1628e9a65e81b0ca2c4ae61156398d SHA-256: aa07472071e69c4b565b215ac6334755f2226743fea5576d0b4e2f39a4adfa04
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and appears to be a lure, possibly related to 'friv menu games red ball hero'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607738793b226---zoponega.pdf In PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/nadojadilaz.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/36148647636.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9257a7bb319da065b3c796a1321785a4/mipigoxirilomunomomefoj.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/blqsguqlvi2qiab09mlspt2q0n/21763526195.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/9td2eb95fvdbdmk9r2np9dqlpd/62634542069.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/dd075b984819a21c8cd4acec5c4c2dd8/97771962647.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/91697706140.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/zepubowofub.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/6d58g3ghj0ma7hoggbr68l7gc2/ditubavubajizizovevigi.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/edec6ec9a0076aa1df698e74fe0e9b7a/gobepujuliwog.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/7ac21fe479d05a065d5a8d09d962cd82/junezenijifazuxap.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b14aeac57b---41262236311.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d26b8765ae---malesalalesasa.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/5878cbea5b0047e1a542c82b94ed8b7d/gixajabeme.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/j91hp6n099bcu3ios5qk89m38r/89640201013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=friv+menu+games+red+ball+heroPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89D 5396 bytes
SHA-256: 3cf723dc3141c24c302b79d7d4ea7110d028e8bc8decd4045362de7ada5b0118
font_01_sfnt_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 9652 bytes
SHA-256: f94e7b19b3d85a46f9adce01a8f698f91c9accf0d431dfcd5729556eaadd12b3