Malicious PDF — malware analysis report

Static analysis result for SHA-256 061ac5783c1687f2…

MALICIOUS

PDF

92.2 KB Created: 2021-08-13 18:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f063aeaaad959d9c7448dd6d402420ae SHA-1: b13f24863f3704947ef64485ad1e6b2773445f54 SHA-256: 061ac5783c1687f2dc8951cd60a62a5efc0a7459734e803d66b17004436bad83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of 'utm_term=boom+beach+hack+ios+2019' in one URL suggests a lure related to game hacking or cheating, potentially to trick users into downloading further malware or revealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0310dc134cbb20cf59e75b3738bfa737/xumuxuzili.pdf In PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/43dc9ffb819651f4b2aabfd35b241d10/41945727353.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/49069702650.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/dq6c9k6eium0gksvj6jidfkvb0/jolesebiwop.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/lonaxiwe.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/59f7ad16aadceebe2ead2810f0860186/jenikewonaxudoref.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4d11fbdc62656c913123d70af43adf3f/8868485180.pdfIn PDF document text
    • http://artside.org/data/temp/file/tarakufefokumafobalif.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/80eba2f897ba2782016134b7eaf73f65/57912007184.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/volonogolakulixod.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/sefakomumegejeto.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/2776535808.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/743340367.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/55bb7799215b40a3616564c65faa9385/26200675846.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/67108592273.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zudilevom.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/56115605230.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/nozefakepig.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/14610701270.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/de1ierjeeo9r71bmnppajvhdjm/jebefajotenowe.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/lefazijete.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/xesawibenerisulapadofove.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/78391382792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=boom+beach+hack+ios+2019PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 17520 bytes
SHA-256: d5b50852b3583e45f77b0c808cfffd40fa378f1684b3fadf4100ca99ad92b3b1
font_01_sfnt_off00011aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABA 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_02_sfnt_off000130e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E3 10892 bytes
SHA-256: e1e2c1ca03feda9d8c0f3942d222d901ec886954bac6938e4588c5bd2c358389
font_03_sfnt_off00014a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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