PDF malware analysis — malicious · b0bc7778fd319fe5

MALICIOUS

PDF

79.6 KB Created: 2021-09-02 07:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: ce79bbeb28544fe8ba9d1cf92879f46c SHA-1: 0c648cf3c564da82f1bc3492d3b6af189b5c577e SHA-256: b0bc7778fd319fe541ab45b07cdc241518e4b6c22fafa6f6d310c154e521abdd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other suspicious domains. The presence of numerous external URIs and the classification as a 'Phishing.Trojan' suggest the primary goal is to lead users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://medvor.ru/uplcv?utm_term=sample+phone+interview+questions+answers PDF link annotation
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87ad9d84fe---zawezigivopigipukavapura.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/24f21fd60224cfd7300b4cd219cb5d77/74741288822.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3010016e7---6922435689.pdfIn PDF document text
- http://almar-bus.pl/userfiles/file/17694766694.pdfIn PDF document text
- http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/nigozubatasojasorimejisol.pdfIn PDF document text
- https://ptogel2.com/contents//files/fuvivanazafobubu.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2980532839a47b8f49ae27cd5b4647f4/25992451558.pdfIn PDF document text
- https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/n7m424q9gvn5non7q71artqmmu/91536557727.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130260201e7e---subobe.pdfIn PDF document text
- https://bikidi.com/UpFiles/WebEditorFiles/file/6337066853.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/60426900921.pdfIn PDF document text
- http://designpavelzapletal.cz/files/file/netavinivefikesevuw.pdfIn PDF document text
- http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/xilovuzukigizanipinosafe.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/a49ce24cc7552d6e5473ba7fff8b497e/92677024081.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b483d0dfb55---45231804094.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/cuami5ag49rdckhb8hgvv0i6dg/91442496633.pdfIn PDF document text
- http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16080da7d05fc4---43460471602.pdfIn PDF document text
- https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/497545755bf8f0957c9466d476d13d88/29524324997.pdfIn PDF document text
- https://kham.vn/userfiles/file/9440981243.pdfIn PDF document text
- http://pasted-radio.de/web/files/88595921792.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd39000c50---60345190813.pdfIn PDF document text
- http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/8bovqr8okotg3laetm2e2vb7h0/39713481217.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7d55a203f---fudizo.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091a5228fac5---68665976669.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1CA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e9e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9E1	10988 bytes
SHA-256: `3efe17007122c46fd9a83ab7dc46df1663fa8bbfb347f31c5d0e5ef8a2694431`
`font_02_sfnt_off00010330.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10330	17740 bytes
SHA-256: `5cbce9ee00af8fb88fd6a503b93df555616af659d436db60514ec633732f1bf3`

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