PDF malware analysis — malicious · a5e401906f8c2c07

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 02:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: a4926640e200d00756ed94e6e5200aad SHA-1: d11f0967f25bcca4102ef4c9cbef94e34ec7a03e SHA-256: a5e401906f8c2c07fc2c0beb989610e20b653777212a8f68d059f2c700cf5f8d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The primary goal appears to be to lure users to malicious content via these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://ddshower.com/ckfinder/userfiles/files/7997958083.pdf In PDF document text
- https://terminal.hr/userfiles/file/jonefipekitoposusox.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f3641b9c4---75401607065.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb23295287---21914992442.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767ff17471f---fedesezogenutafa.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca03669066---41348460711.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d23dd66305b---kamawelatirulufukegufawo.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085dfc5153b9---60798984012.pdfIn PDF document text
- https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/nu4la08k104m51s4ihom1p5oic/6488417797.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c002b987a5e---lavepaluketojiguvut.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a519a184c---rereli.pdfIn PDF document text
- https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/q3edfrrhmac7hl0d5kfuel1u17/14022470289.pdfIn PDF document text
- http://sun-eko.eu/files/file/lixejitilelotafojiwad.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba4945588f7d786dc05859c3d1c85af4/17338514017.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/fccba534c637e5bfa7cc06b821545214/mamunetuwegexapikulux.pdfIn PDF document text
- http://studiofelician.com/userfiles/files/53116813174.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085a75b253ec---4884417269.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59c474caaf---18251168373.pdfIn PDF document text
- https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4uf3l5brqfn6pdto910g3hd1e0/46660756477.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dad0d9ce69---24538566237.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c84b38f39---muxajakapuz.pdfIn PDF document text
- https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c77328b4---ladedivitakidosa.pdfIn PDF document text
- http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072840a2ad7b---taxivinavuzopo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ordinal+categorical+variablePDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e9d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9D2	16932 bytes
SHA-256: `2d7dbcf427d99237d9d7b288217be59e3ce020a8d0c0455c1010c4d57d374210`
`font_01_sfnt_off000115ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115ED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012e04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E04	10608 bytes
SHA-256: `5e1e159288b9232daa943cd09d787d25e82672837c057715b24d799fc5965c5c`

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