Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfe917be0bbc4e8…

MALICIOUS

PDF

83.5 KB Created: 2021-09-23 05:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0ae3f70854952eb0ab4ac0a73565243e SHA-1: 0a485b0c97433d62a5cc8119ba8a52dea707b5e5 SHA-256: bcfe917be0bbc4e86378e31e927d0747f60b3e243b136465b4bac6f9210b70ac
164 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a 'Download Now' lure and numerous links to external sites, some hosted on compromised CMS platforms, suggests a phishing or malware distribution scheme. The document body is heavily obfuscated and contains no readable text, but the heuristics and URLs strongly point to a malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ubytovna-krumlov.cz/userfiles/file/zawub.pdf In PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/56f9jdeg5d72mvf25r4f0ralf4/61947228598.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/mazexomejuvotanukize.pdfIn PDF document text
    • http://pk.mo/userfiles/file/xaraxeniludaxekevexit.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/wajisokunitanadikatexekum.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021919238574586.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/56789643305.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/47091273886.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/kajevalenekapisixizo.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/53726667795.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109091920177747.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/dujipabupepigemo.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/ganidowuzanijizase.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613b498e2972a---51946719646.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/8a12b25d7ecd0235143d872c1d9bfeb7/tipamerape.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/remogimuwonofebasasipukak.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/xametunewejobavozamex.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/nazomofokojesuw.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/sopepafesosetuza.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0de9d5a01---fefunumavixugumefuk.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/92025330533.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/5044256136.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/kuxed.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161459b8745ad4---21806022492.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/v1tmbja0tc2li0it9mp9tnqf7b/kagideroz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=shadow+fight+2+diamonds+hackPDF 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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 11020 bytes
SHA-256: ed9b19cebc3023b2b97efbcacf61d1bc74ec3a6dd6ebe44c06f84996624471ad
font_01_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 17532 bytes
SHA-256: ed392f6be14128c8c475844d323f11088636a7271b9bd37972b0c39d621385dc
font_02_sfnt_off000127e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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