Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a78477add0fa5fa…

MALICIOUS

PDF

97.7 KB Created: 2021-08-10 15:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe0bd408170bea450861d8cd2396ea61 SHA-1: 71db0dcca61a6d737c55f75ae3320e64e36d78ea SHA-256: 7a78477add0fa5fa442c40efc1a043bd4fe5e600ce34a4032a6ca6ebc6530fe2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely to manipulate search engine rankings or facilitate phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may exploit vulnerabilities or lead to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a2dd303f7842a257c88a44a05389e0b6/daravumuworu.pdf In PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/g8qtfd5noj6bgdvolvde3ktj8p/saxijavekovomixubuzirixi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f13118a14---8863931059.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/loxedijasowuxinifodosenol.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210728_7D149D3B3B15B1BA.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/84a1aa4da8e7c91b225b8d4ba37eb38f/24227323395.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/70f2a01179747cd6a6d19c5b1ffa8e84/97537623554.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f29437e34e---fiwalokegogo.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160892515bbf54---89900071722.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/15387789779.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/31140545621.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/49333146019.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/801b5fb35b732b9f187b30972e84d90a/guroxafesumofuwok.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/suligojezexoz.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b61db766d29---robetegeru.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bi2marq9pag78k5hq5tm5993f2/sebamapejerosowemonugod.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095bc2744480---lozirulujutadimefodeno.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/b8d606fcbf9b736e53edb47d54f4570c/2142073764.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/a1p80vor1qfv4vkjntc5mbu3ah/2122041452.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/zomomemuzadowiwufuzula.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/73173125705.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777a289ed09---balare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=forming+abstract+nouns+from+adjectives+generousPDF 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_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 11188 bytes
SHA-256: 4ef082b8dac44edbedb2ccff4302fdf144142bca73d096b587176e744c409577
font_02_sfnt_off000148fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FD 18344 bytes
SHA-256: 15690ba2322256ec974fb58ffbb11f794dd68db92c9ebcaa700b117d254ba830

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