PDF malware analysis — malicious · 5c1353a3479fa5d1

MALICIOUS

PDF

89.3 KB Created: 2021-08-09 00:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 335478b679dbad98f43ad6d7def9b075 SHA-1: 01f13d89e8958c2b5559823fac8d93d692a33b9c SHA-256: 5c1353a3479fa5d106ab4b635999c9eaef891f2fdfac4ebd5d4697d557a24480

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to multiple compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of numerous unknown URLs further supports this, as they likely lead to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9886

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/da76dbc7739cfe3ecea73d374af2887f/tizanijitaz.pdf In PDF document text
- https://etest.vn/app/webroot/uploads/files/fisadiwibovagakimupi.pdfIn PDF document text
- http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab050790f8---panoj.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/9mom77hptpv3erv5pnu3dtokv2/vadezo.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/85d996aff13f3bb846221a757de06b3b/sidevi.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0ac845614---ribetawineluto.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c206aeeff---4715791624.pdfIn PDF document text
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/f418gm17b8u04ei70u4suc1c76/91336855807.pdfIn PDF document text
- https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/3vp0d27e9n5mibpke9ku4e60bj/70385260045.pdfIn PDF document text
- https://kitapkapla.com/upload/ckfinder/files/faserelepufugadipojarisaf.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883a61ea36e---besoxiliz.pdfIn PDF document text
- https://bancodevida.com/bancodevida/admin/images/image/file/dobosikomop.pdfIn PDF document text
- http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/5960443496.pdfIn PDF document text
- https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/5f9e27cd163eb9aea6c4cec31629efbc/79893551284.pdfIn PDF document text
- http://dansecyr.ca/pdf/file/moxinim.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080701dd70c9---wivefadadi.pdfIn PDF document text
- http://computergramm.com/userfiles/file/6715187014.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160fe03cd7e661---lufarasutofur.pdfIn PDF document text
- http://www.odnpoznan.pl/fotki/file/file/94253058247.pdfIn PDF document text
- http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/27297057528.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16088ac4253769---jizakesezowifusalaw.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a080d411d80---40917112525.pdfIn PDF document text
- https://culturasiapamplona.com/guiarte_userfiles/files/20810010269.pdfIn PDF document text
- http://dekogard.net/deko/veri/_files/todejekigorulukasugu.pdfIn PDF document text
- http://energy-labels.com/userfiles/file/netimoredovelabawezasobob.pdfIn PDF document text
- https://assignmentmart.com/ckfinder/userfiles/files/39308301387.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+design+pattern+does+react+usePDF 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_off0000f821.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF821	17164 bytes
SHA-256: `27ab7a1b0ad1f3336062324e16f3d9fc1e0f8110fb44e48fbb20e6e908280502`
`font_01_sfnt_off00012549.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12549	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013d60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D60	10840 bytes
SHA-256: `42cf30cf5d715176ffe6cfe09127f71104cc5d8df4e3c2a6c0a03f267c0e8a2a`

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