Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c38a26db5b4e55f…

MALICIOUS

PDF

89.4 KB Created: 2021-07-13 21:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9619bd98a21f5a49e493ae7afbfc09bd SHA-1: 60f39b0e04a8f46927f456311fcf7f70ec2af48e SHA-256: 9c38a26db5b4e55f9f632aa2f5b830eef24416127330151edcb5f9b44e849bb9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to compromised websites, suggesting an attempt to host malicious content or phishing pages. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection and ML classification strongly indicate malicious intent, likely to trick users into downloading malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090d9283ab17---18205433446.pdf In PDF document text
    • http://eurekaelearning.com/upload/news/file/gevodazovivi.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/vtv776cc78ro36qc5d7b946sc0/fulojigawuponibadol.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/80001367333.pdfIn PDF document text
    • https://bak.vn/upload/files/pudizesavulumujevebuvaduv.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/zimilowolanuxivizuzikilam.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d656abd5d---zugosati.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/18553510800.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/68837172430.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/9q4fbrshcb43nu1le8etglp3g6/wulazezinudi.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160755fda0fb46---sezuboduj.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16074d42420153---numodu.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/mugopodag.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/fupogarorinudutud.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/todiviribetizeni.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/40224437476.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befccad6d85---3940804759.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7fb93a9801e13be04e401c6dacb41db0/94564919203.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/76749810525.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/47921316096.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/bb45085ed9b6490bcb93fcc309744a52/xobexolawoti.pdfIn PDF document text
    • http://web68s.com/upload/files/gomogexolexexuzenag.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08e4f75143---gewenobomagevolupidome.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/70037727204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=snaptube+download+pc+windows+7PDF 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_off0000faf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 10860 bytes
SHA-256: db8c14b75db4532118bda84bc74299672d199940741fb478ce346615016b527e
font_01_sfnt_off00011405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11405 17020 bytes
SHA-256: 0b6164e2198c95d52b3cb8f26d3160fb4576ea19847d271c7b6462befd55c522
font_02_sfnt_off0001407c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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