Malicious PDF — malware analysis report

Static analysis result for SHA-256 153f4778e374e6a4…

MALICIOUS

PDF

94.1 KB Created: 2021-07-26 20:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 88d9d5c5debb04b6ce65e90a007b25ac SHA-1: 07fb4fc99689e0609f40dc87aa25f5e59c3f6917 SHA-256: 153f4778e374e6a46ad570b157ef9d7c73a9bfaa777b936af9bf40a783d716f1
164 Risk Score

Malware Insights

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

The PDF file contains a link farm hosted on multiple compromised websites, designed to trick users into downloading a malicious file. The presence of a 'download button' heuristic further supports this phishing attempt. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • 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.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6306920c6---xevuzeledawev.pdf In PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160802d88ae6e6---67743329160.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f71acaab6e---69725329608.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbbc736a8d---nifefuf.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/76535293700.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37828582547.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/10195111529.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/13470702527.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/75890241595.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/vokemomumovomomosiwoze.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b299e4621a9---depufi.pdfIn PDF document text
    • http://gyobel.itpublic/file/4159656400.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/29793990594.pdfIn PDF document text
    • http://onboardviaggi.it/themes/userfiles//files/80089597969.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160729f3967e1f---64578124364.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/44338021572.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/jcps189aorqgj8r50tfvom3783/39738776948.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806779e0a5d---74942678233.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/duwukunozapasep.pdfIn PDF document text
    • http://jp-cable.com/d/files/vifenagudod.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f8a864278---sibusigaponip.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/78424960018.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/301a6af6f69635fd071f479fa3d50631/58820055737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=sims+freeplay+mod+apk+vip+points+2020PDF 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_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 18040 bytes
SHA-256: 2f6ff112322dac52947019b8639ccfad7b44379cabf8b4883af060aadab8f639
font_01_sfnt_off00013704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13704 11248 bytes
SHA-256: c1b79c953213d57c629ab220569267f02ca2c0084abcafd5a21c607df6b926cc
font_02_sfnt_off0001516d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1516D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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