Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8ae5f655e0bdf7…

MALICIOUS

PDF

89.0 KB Created: 2021-06-27 22:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d0a02ba2fbcfec8b996685aae7f0369c SHA-1: 9e61f066e0ac326c81ddae8aa293ce6cb0f5d9cb SHA-256: bc8ae5f655e0bdf7d593fcd8e23f4a128d4a8e72950178752f8f6584fb0e9a46
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites hosting further PDF files, suggesting a multi-stage attack or phishing campaign. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079225b5097f---89225470138.pdf In PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a46018c3ced---gagivubepajiwudobexogevi.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/70cf7ebb9990dd40e35bd0fb0e3fe264/gilidon.pdfIn PDF document text
    • https://giustofiori.it/file/27429218780.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/tozotimogotirit.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/87320328080.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/0h33k9a39329rn2iq4hnvrhqn4/vawavixatagiraxoro.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/68bd127df6066ce8f0aeea5c0c81c528/rulobu.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/pupikizad.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/gevajiwimozonebabuzekani.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/26eb1df85dc0d1de28e8ebea0761327f/74518967887.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/b094779e04dbf3a3d881ce692f060cb7/82083898669.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/rigewezupugovejiguvape.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a6997ecad8b---29643783646.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b25f87ba52c---79721107494.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/efd8fa35bf425ecbc5f2cfffac0e83af/vazupitopa.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8ec430ac548175e0c58e68d461e09400/24367672928.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/c2ab7df45eac7a7ae8fd92a58c980241/jupiw.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160772137042f1---31838833275.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/6543fc40d19006805b94c5f1a8a0c3e4/jaxoxarusujisotulazurawu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608513d7c57de---xoguxaruveresesefewokigo.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/zizez.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/3db4ebd70eebc4028c4c6af206d553ea/samapisa.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/v6qqlvgp13uc8slfi96rbkpst6/13629026306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wastewater+treatment+plantsPDF 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_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 16944 bytes
SHA-256: 8db8daae9a79bdf9e5be96bd222ffe6dd10c1adb3f14926d8c599f80a831de60
font_01_sfnt_off00012781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12781 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F98 10280 bytes
SHA-256: 784797e5f9e36859087505ccb710eb523f26f008ee399b70b60e1156c1c69f49

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