Malicious PDF — malware analysis report

Static analysis result for SHA-256 7782de69e8e2e1f5…

MALICIOUS

PDF

100.9 KB Created: 2021-08-08 17:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6dc98b7c3f6112e7e81717af800bafd9 SHA-1: 8364f8b1c4b0ec3d062ad3a69c5950977b713125 SHA-256: 7782de69e8e2e1f51e40c4c55c8948332dae4b417bea5e93e15132a137b0344b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://newgatedesign.com/Images_upload/files/82022048522.pdf In PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/6aff647013d72ae0ee164bef0257941a/norajivodezizojuxef.pdfIn PDF document text
    • http://starlightcelebre.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/ramokadonedut.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe6692bd93---ragovupepanowokubar.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02467a2eb5---91165359506.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/seketosuzonopokidovopiju.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2ab743bda---xulejaguga.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/9q13oa94b0pn2i622vnhq1vq3q/kurevonumezexiwojox.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd506778f48---14491331905.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/75ec038c2ccd1aeb8747a8a91ca66513/77189707303.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ruk2oac0cfrcd1anjk4ojvkj13/vuxenif.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/12630194501.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/0f20750d9accc07f6f7412b6e1b04b6c.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/komezokenegalimifizo.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/58026482195.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/fudifejafo.pdfIn PDF document text
    • http://axwelindia.com/uploads/31260548983.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3fa1130b19f893591fb8e9b6d042e14b/witofid.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/83951497497.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/46059368058.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d85c678090---wuzegado.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/30323200088.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/adpr7cfjo098n186mh6dsl9vc6/lofegitulufemanadibaf.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893cf392310---norusiruxodelajodopixedab.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/1835c7cccffa4f8598805ed97b78077e/gefidejejoliwalutiwunibuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+pick+winning+scratch+tickets+ontarioPDF 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_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 17880 bytes
SHA-256: 7fad11b055bd100b8d3e14abf09e9eda1344dddadef37a884eff951277f8b4d9
font_01_sfnt_off00013b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000153b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B2 10776 bytes
SHA-256: 4e3b5ac1802343fcf4a2182a43896f3eb6031b7cafa94ccc25936eec1caa6bec
font_03_sfnt_off00016c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C8A 16820 bytes
SHA-256: ea19257008a82247f75e6193c173071ebc94c8f02135aa90b5524b24acc3651e

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