Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12db827c7c0cf7c…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 13:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 24b2091116f732d2b84ab204421970f5 SHA-1: d0bf5ff08e7fe36e9b936bd78b5d37d56dc27ac7 SHA-256: d12db827c7c0cf7c5f042560115de6413b4e01794dd76012a5edd688e32a4e5a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features numerous links pointing to compromised websites, some of which are hosted on disposable domains or use link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=among+us+apk+all+pets+and+skins PDF link annotation
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3022a271e---lolepufuge.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/51995959492.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/muwedegajewijawinola.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/70175176416.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614235501f1be---lizufidomezoforaxesu.pdfIn PDF document text
    • http://webs123.com/userfiles/file/vonowapomogasav.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/timevedizefupukewamupuzi.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/sinkthtbedljoqvisratmjma0svr82pk/kelitekoxidinemokapifoget.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/66153835506.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/mizaxuzigikapu.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/93889260980.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/tobuzagafagefeju.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/vumololipifigixere.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/bewivubafobefevafojo.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109160207521036.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/7558864390.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/taxeba.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/64040302937.pdfIn PDF document text
    • https://035620126.tw/upload/greenkitchen/files/miribox.pdfIn PDF document text
    • http://futboltotal.net/images/files/pusupekopunorimaxa.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/78779760316.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/betusirufezubunev.pdfIn PDF document text
    • https://558com.vegner.com/userfiles/files/20210917_085341.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e7ca494a4---fijopa.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pilolupe.pdfIn PDF document text
    • 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_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 10808 bytes
SHA-256: b735300cda37577c24e97cf3b2e5b4724fc6bdcccf688d4f91b2fea5397c13ac
font_02_sfnt_off00010ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACE 16884 bytes
SHA-256: 4daadfa47fa6371bf84bc5e845fad24c766291d3c6f30f624d5a703bd419d075

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