Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b9e89ebe11d73a…

MALICIOUS

PDF

74.4 KB Created: 2021-09-25 11:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e9829a2d145dcc01e9fc475332183fbf SHA-1: 4898e156ba78458ec8d86db8178bb7ac5476f866 SHA-256: d0b9e89ebe11d73a0a335a4706b6e1aa460b3a8874985275d71796bce7c4958b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains embedded JavaScript and numerous external URIs, many of which point to potentially compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dyglas.com/userData/board/file/46685343322.pdf In PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/75216537298.pdfIn PDF document text
    • https://sapporopools.com/contents/files/16679382256.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/31304547679.pdfIn PDF document text
    • https://limsurempat.com/contents/files/26762204388.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/wolomubesewu.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/32649145637.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/diwamamapezu.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/fanuleginumezoferuderamok.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/lewiguz.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/rolawolonowoj.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/rulamej.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/u8fh460lg8oq9m5bhohq68vptg/sezotebunin.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/foseferakepuvejevimifele.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d27df41755---52713822844.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/67178732190.pdfIn PDF document text
    • http://dnepropress.net/files/file/44279327911.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/romalavuriw.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/ladelajiguka.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/batepujoregofozib.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/bawokikajo.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/80898959846.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd97b0e51d---zujupapoki.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/pirulerizujadazasidejis.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146d7b446415---51602120305.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/juraxomemaraxuvigovekipi.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1614255bc583ea---73164946721.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/vrmpoggm3c45m8bgj2hih9rhn8/46561933704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=doing+hard+time+full+movie+123moviesPDF 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_off0000b6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC3 11312 bytes
SHA-256: bbb1b861fbcfa06e86f859d21f38b9137079394ed3a88c67632fbf066e4f931b
font_02_sfnt_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 19156 bytes
SHA-256: 0bfa63fd5e5f465643e3dac074e3e099a3f0423059943e1b8c99dd09676df4ab