Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6809bbdd62d975…

MALICIOUS

PDF

83.1 KB Created: 2021-09-10 19:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4d4c9aac11aa2f60483d949bd2f0a4c2 SHA-1: 036c29cb975a9ff94707d73640f19334960f68ab SHA-256: 1a6809bbdd62d975361c1a0a783ae7ab3f377e5e200139d345e64d5e797955af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites used for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination and evade basic detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=do+egypt+celebrate+christmas PDF link annotation
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca59b0a51---fuvakituxutojimawovude.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/rududo.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/40601090140.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c7eebe201---88727050080.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/xorerotoza.pdfIn PDF document text
    • https://digireg.dk/upload/rojiz.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/14438248784.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/zekategekikagujipobavu.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/43763101002.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/66306803778.pdfIn PDF document text
    • http://storemisr.com/uploads/files/rananesisokaderojelosonev.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/bupujeli.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2641920424.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/jigirovukadifak.pdfIn PDF document text
    • http://poptheme.cn/uploadfile/files/20210902_030516.pdfIn PDF document text
    • https://geloracinta.com/contents/files/22166722490.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/50529001889.pdfIn PDF document text
    • https://keongracun.org/contents/files/woduvi.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613870559cdc6---nomisitezuzog.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/diraxuperaribi.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/favibelel.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b478322673---zupapujogepumetasiwedej.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/24313553268.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/newegezuladifekowetalafu.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/junuxaxitebabowifoxe.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_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 17296 bytes
SHA-256: 6375b3df8b29c2901adc2449bc9bf533e54e7f99ab07502e66bb8fd367855529
font_02_sfnt_off000125d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D7 10972 bytes
SHA-256: 0906c75ed9cd6692b542b1ce857428f53c9e1aa4757544231145fdf2a19e844b

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