PDF malware analysis — malicious · a3f244fa5063dd9f

MALICIOUS

PDF

84.3 KB Created: 2021-09-19 04:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 3f84061f7aa5debcfc4828adea1ec0d4 SHA-1: 8316008e33812c1347724e772dff0a9d511257aa SHA-256: a3f244fa5063dd9fa35a6a479cc234db8574e741b58fa283b6beff44ac85f00f

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1534 Credentials from Password Stores

The PDF contains multiple links pointing to what appears to be a link farm hosted on compromised WordPress sites, designed to redirect users to malicious pages. The 'SE_MFA_LURE' heuristic indicates the document's intent is to harvest credentials or abuse multi-factor authentication. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's part of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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://synerhu.ru/uplcv?utm_term=how+to+import+whatsapp+chat+history+from+android+to+iphone PDF link annotation
- https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161382a7406484---foduzujuzipu.pdfIn PDF document text
- http://claudiamelchior.it/images/file/pelapujaroze.pdfIn PDF document text
- https://cnn-logistics.com/asset/files/73538772718.pdfIn PDF document text
- http://nawoo.net/userData/board/file/85715836468.pdfIn PDF document text
- http://soft-pro.hr/upload/datoteke/19065281314.pdfIn PDF document text
- https://viessmannboilers.ca/fck_upload/file/10763843196.pdfIn PDF document text
- http://gyndoktors.de/ckfinder/userfiles/files/degogufezetapepov.pdfIn PDF document text
- https://cafesca.info/ckfinder/userfiles/files/temewa.pdfIn PDF document text
- http://446888.top/userfiles/file/52751502787.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614637f941e9e---sewido.pdfIn PDF document text
- http://nj-rshb.com/v15/Upload/file/20219121437566613.pdfIn PDF document text
- http://frutapac.com/ckfinder/userfiles/files/85072854242.pdfIn PDF document text
- https://behagi.eus/files/galeria/files/21471521844.pdfIn PDF document text
- http://thanhlapcongtykiengiang.com/upload/ck/files/44766638797.pdfIn PDF document text
- https://albizy.com/ckfinder/userfiles/files/nuretiwekoxutudanojuwap.pdfIn PDF document text
- http://sichera.eu/userfiles/files/jaxebosaditawi.pdfIn PDF document text
- https://himalmanpower.com/ckfinder/userfiles/files/nobutajijixavaguwipe.pdfIn PDF document text
- http://aytekinpolatel.com/image/files/sipudevaxe.pdfIn PDF document text
- http://www.frank-diagn.hu/userfiles/files/80932276303.pdfIn PDF document text
- http://elturo.ru/img/upload/files/39508152211.pdfIn PDF document text
- https://djecijagarderoba.me/userfiles/file/79967870993.pdfIn PDF document text
- https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/74146951295.pdfIn PDF document text
- https://inwestorfinanse.pl/userfiles/file/babaxel.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142cbfdc923a---xejodijizis.pdfIn PDF document text
- https://lapdonline.org/file/41240642975.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_off0000e26c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE26C	18060 bytes
SHA-256: `3718894a7cb20935bde2f12f967de9373ecb3ee40d82e34a58262cd23cdfef82`
`font_01_sfnt_off00011142.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11142	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012959.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12959	11028 bytes
SHA-256: `180ecfcb8802ee47b18bd45abd953a0d87c4d1d1d1b085b247b9bbadb9a6e0c7`

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