PDF malware analysis — malicious · 04c5f569dedaf512

MALICIOUS

PDF

87.4 KB Created: 2021-07-05 21:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: a8b1cd6e6a04663e1368e5e20bad1d2c SHA-1: 6dd23d5c0404138dc060d8321060f4159f47912b SHA-256: 04c5f569dedaf5122d81a7ac885e0cfc67c81bedaeacfba31ac4cce3d83a25ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

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://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7302a0580a4569d3531c6b2c28fffab5/62978952833.pdf In PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f6e8124a6---70183945637.pdfIn PDF document text
- http://biosurfest.com/userfiles/files/13985691649.pdfIn PDF document text
- http://blackivy.pl/userfiles/file/51049453908.pdfIn PDF document text
- https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/de975886d3b64c1d67bc18a75fd4f333/44955782913.pdfIn PDF document text
- https://binarbaidtrading.com/public_html/userfiles/file/8455076573.pdfIn PDF document text
- http://edgecs.net/documents/20961295653.pdfIn PDF document text
- http://texmet.pl/userimages/file/92828983858.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8c5d862025c99da520bbd231a2b4188c/pejesuduvamupinera.pdfIn PDF document text
- http://etpatatietpatata.com/userfiles/files/bugolewibaw.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/401f76f36ae1b3984105fa824c4dc2d9/wixejoxax.pdfIn PDF document text
- http://alfonsoguiggiarchitetto.it/userfiles/files/nelore.pdfIn PDF document text
- https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/f657535d23b146323d7df1386d59d014/46479317229.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ca4ec249a---87237593066.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7a559852c---60576697828.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/54e99c420a7581fa898c388fe31d69f7/zetozovizazopa.pdfIn PDF document text
- http://gptools.net/userfiles/file/kirumu.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b20e3678511---88501348345.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/8jm84i869ue81u7lph189f36ks/65395669162.pdfIn PDF document text
- http://kirilmazbardak.com/userfiles/file/95908583449.pdfIn PDF document text
- http://intrinhgia.com/admin/webroot/upload/image/files/8512803403.pdfIn PDF document text
- http://banghetretruc.com/media/ftp/file/nivakiwekanax.pdfIn PDF document text
- http://maslag.eu/userfiles/file/xibexogirazur.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/kubaravujagez.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ed5890a98e974a53e5c0d952d8d7480d/71823870556.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/babb123a30541677f21c03091000d0d4/rogojijamokeno.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=browser+for+pcPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e65b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE65B	17088 bytes
SHA-256: `d018f3d551aad87d336f4185dd04b3eddfbf0b9bdc95bf15c33d0f7a4514ec75`
`font_01_sfnt_off000112f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112F7	10108 bytes
SHA-256: `13144be90f0ec4415eb1d481a1379e644e62059c08dcc1d24b07c955a25b895b`
`font_02_sfnt_off000129c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129C0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000141cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141CD	3604 bytes
SHA-256: `72331a0ca6bff1814717cfbb91ff2653983b93ed4cb9844d8edffc768b43fa01`

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