Malicious PDF — malware analysis report

Static analysis result for SHA-256 097e70df0eb7831f…

MALICIOUS

PDF

87.1 KB Created: 2021-09-02 18:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa65cb9b6e6bd46145cb474672ab4c15 SHA-1: f8eea77cbd4dee209d3f1c1518275790a2f467ab SHA-256: 097e70df0eb7831feb4c1f49096cbe2594ac67903a9e08359cc3d4fa38dc8e57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://aj-logistics.com/stock/userfiles/file/12365266455.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8c22918399ae70b398b96b5ab0d27f62/fukenitusak.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/56354436461.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3d4386d48---gupapareramomajewovejo.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/99998597564.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/42389546007.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/zukimefajidup.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957a38475dd---87630850433.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/joware.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/59144242829.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/zalivineruzizexi.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1eaccb802b260f641a78a2eb27623f3e/ganuzopebeloloxufim.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1migpvv1c6fu584f8o2lhv6tn7/bikonotoxamalav.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/81946431151.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/92930789757.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/wezamog.pdfIn PDF document text
    • http://promador.pl/userfiles/file/61234480006.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/29278204461.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/53905573301.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/10248685664.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/katonelekefegexamiso.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/mupise.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac26d3f0fa---muvixaj.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/sajunogutarofafezasaniw.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0f914cc25---wokesarepuluruk.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/28617143764.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/nufexi.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/vevokibejev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=avia+pedometer+manualPDF 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_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 18280 bytes
SHA-256: 26d1bfc1e71ac41ccbddd77d6e225ea5d632a7f94c8215a200b16d749839af06
font_01_sfnt_off00011eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CF 10532 bytes
SHA-256: 5954cecf679eb4ff95c349a62a5bc90b0c5cb6fa4e816b1371c47baedce55dd2