Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebb3102ce03dca2…

MALICIOUS

PDF

87.1 KB Created: 2021-07-13 20:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2944f606c7262516636fffa7730af204 SHA-1: 6fd9fcc94585d2a50ea70507b9a9e3f056a04a8d SHA-256: 6ebb3102ce03dca2e426c422051e4adff5dcded6a33b7c66cd3eb2dc13304352
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of multiple URLs pointing to potentially compromised WordPress sites and disposable hosting suggests a link farm designed to redirect users to malicious content, likely for phishing or malware delivery. ClamAV and ML classifiers strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://bilalyapidekorasyon.com/userfiles/file/28543838695.pdf In PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/4c9d9f1801f610ac3cb5e06b2a5d4b06/tinomob.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/87474730384.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7bed66ce6---tirebokomesivezi.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/xatisuxesogujobozujakegab.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7fcd1f2c---24904073493.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/ripemepi.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/tarogedezotopubu.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70123235543.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2eac75e95---44145367464.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/zufusaxajapabejexivugoxiw.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210629105023.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/mabebup.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/12573334449.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/midupofepibelar.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/17998709942.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c22d5623f1---40692164016.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/k573sftp245kc58ipm5p0h0c33/jigijijojufekoxajotup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=5th+twilight+book+release+datePDF 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_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 10776 bytes
SHA-256: 538e3daed2915690246f282130075ef28d86c36197015520e0ee458ac8b36e77
font_02_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 17768 bytes
SHA-256: 122c0836ca4ee0f4d17c9f79e38ad720d8ea99da82f7e0336afb9a486a4542a2