PDF malware analysis — malicious · e3f377d1eb6b726e

MALICIOUS

PDF

84.7 KB Created: 2021-06-26 02:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 3330cac338d89760c6109af0ba128e86 SHA-1: f67a62b4c543695a7408c52b7e428fd8f4f1f99a SHA-256: e3f377d1eb6b726ec00cffb415728684a34afede66a0333869b9ad46eb53bf37

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous external URIs, many pointing to compromised CMS upload storage, indicates a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=how+to+draw+a+car+tutorial PDF link annotation
- http://www.allatpatikapecs.hu/images/file/sepazapej.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/3ba64485f680bdb30aaa300ca4568e26/kitoruretefujobaganiwij.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c6b52e188---23083655228.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/gekitorowujasimafemed.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160baf81cb3ba7---74570215846.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094925331e21---jofivuxivav.pdfIn PDF document text
- http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af82db8f415---3016410245.pdfIn PDF document text
- https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62dfc17e08e0695270f39a5ee804aad8/fozumolenibapakuj.pdfIn PDF document text
- https://2acontractor.it/images/file/37115642248.pdfIn PDF document text
- https://batdongsandothanh.vn/luutru/files/52050377363.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/65f1f3f0007789f32ae6a42a6c553a1b/boduj.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf31586da---99733060838.pdfIn PDF document text
- http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wubadujobiberonususorifow.pdfIn PDF document text
- http://jnnycc.org/userfiles/file/42484015364.pdfIn PDF document text
- http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/88438291950.pdfIn PDF document text
- http://paroissedementon.fr/upload/files/52314185599.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abeaf572d67---pigexebapomi.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b9345de14---gezekit.pdfIn PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/0b87fa5159a25f10d34096166f93fdc6/64258822152.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69f5fa9110---69451225412.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/8b7be5aa8a740f9ada5b8177c7c125e4/48671342844.pdfIn PDF document text
- https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e8ad712b7fc09e71b5c4b30427d2ff25/90223151117.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c06b2c1eb73---98490511934.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/pc1a42cr3a64g8jcknovthkdrm/libunabudijejawis.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_off0000eb75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB75	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001038c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1038C	10136 bytes
SHA-256: `0c8daa19e09b4dec48a0cf2390080c5174481cbb41809f25b06a69df0c08f04c`
`font_02_sfnt_off00011a47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A47	16676 bytes
SHA-256: `7d88fc2bd2ac609785065726a3a4b18a82d6c81f10b4f7786f177255710fb8cc`

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