Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a47c5872f13fd4…

MALICIOUS

PDF

81.6 KB Created: 2021-09-19 14:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11bc63645af5eafaec9442a19f2bf494 SHA-1: a96c135ca2905e038c206d2c20da36b776a23ffd SHA-256: 06a47c5872f13fd499937cf81e05f743023e3fbf32eceef161118092cfbcdf1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crysiq.ru/uplcv?utm_term=god+is+not+great+pdf+free+download PDF link annotation
    • https://lawrenceyezersky.com/userfiles/file/8235440883.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/67890460393.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/50349731989.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210904223021.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/39543012668.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/gezujalugiletepili.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/xaretixop.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/kaguxebuve.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/48658639926.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/kosupobisomofaniwi.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/33275109831.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/sifezuxenozi.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/21580241939.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67ba2a762---sosexo.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b486c6fc4a3872052b4d5cdeb52c2c23/sejudovizajizupin.pdfIn PDF document text
    • https://penzion-palice.cz/content/pibabivulinagovilixisudew.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c1e6b19ab---67418977337.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xodojoso.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/70735786803.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/6284273422.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/27027853524.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/jixelapokus.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/14539677375.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_off0000da74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 17568 bytes
SHA-256: 0221e2375ca22c9d5728afeb199dd8128f1eb9ac783302265974b36b8083e9d2
font_01_sfnt_off00010832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10832 10796 bytes
SHA-256: d445521308e052f0036ccfb6f45bcc10a583525a112dfe760b6747d11ebe3d8e
font_02_sfnt_off00012112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12112 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1