Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e3b296aea404fb…

MALICIOUS

PDF

87.0 KB Created: 2021-09-05 22:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 154d19b945fd2b08930a413289c3f046 SHA-1: 779b9950aeb70e13263adf4a11a74bd4b7c93d16 SHA-256: 95e3b296aea404fb681adb3a4ddaa728b7fdc2f381d93442fd50f590c27e3911
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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 https://crysiq.ru/uplcv?utm_term=monstrous+compendium+spelljammer+appendix+pdf PDF link annotation
    • http://sjhrz.com/images/upload/File/tinowatazedajadukaw.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/66364147509.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/25640349520.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/fa1e86636ccb955157c7bb96bf5b7fe4/96907294693.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/26854281873.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/1ient4ntt62hnt1pq3nrr3v4dq/tububokug.pdfIn PDF document text
    • http://belloverde.net/emailer/file/xuguxutijezud.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d24990fa67---90111667594.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/o76bpi4ff3rb77lg8rsedltk2b/ralofusafix.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/18855908d3fbcba077048e8677baa13a/79363938788.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/kitebulosugemo.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/dugiluxotutuwupugaxijataf.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cv1bitnjk8li2u36gnll6jj13g/93209491279.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ri0lt7jav4bt53tv08oq0le8l0/kifegobobokepoju.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607433bcba6c8---22419037519.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d45b4d080ab---tugilugobejotasimotezunot.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/4314999586.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/3de0c20178da05ccf59c78e6a17deed5/4048069927.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdc5e185d8---fegisageju.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ae4ec4680107ed9daa8060f035157016/89561863681.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/ziruwajisapoxag.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/nudafagakuvan.pdfIn PDF document text
    • http://drironcat.com/images/file/4224479126.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5a92c55d0988534fb100569311e04eea/31749487616.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/134b3eemjq1b19cunpj7lostp0/nemawazidijoxaninu.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-8-7/20210807041426887875.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rixufivoganasumepepotus.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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 18344 bytes
SHA-256: 412fb30cfe863200dd73ce245acfc72718aeb14b55087c9debc25b48d2cd64e1
font_01_sfnt_off000119b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B4 11108 bytes
SHA-256: 47c241a1b0f523f46ca8a0d1015ed231f55883319ec6457923950ec29dcb45dd
font_02_sfnt_off00013398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1