PDF malware analysis — malicious · 6d12d7cfcacadcae

MALICIOUS

PDF

101.2 KB Created: 2021-10-10 04:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: a39f1b5d97e5bf0127c72725278ae5fc SHA-1: 8704d1fa9aa2138b2955a04e0820061c4e910207 SHA-256: 6d12d7cfcacadcae2c907235c806aa3d8dfd909e31b99b0fa363120328279065

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to external websites, including those hosted on compromised CMS upload storage. The ClamAV detection and heuristic firings indicate this PDF is designed to lead users to malicious content, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to direct users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier suspicious score 0.3897

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 http://mmckno2010.zkosuchdol.info/files/wanuvi.pdf In PDF document text
- http://www.lnk-creation.fr/upload/file/46504356164.pdfIn PDF document text
- http://poliinc.com/upload/files/silurovugapotixudabukob.pdfIn PDF document text
- http://montesantangelo.it/files/files/geguniwipakopozuwewonupo.pdfIn PDF document text
- http://www.ezmoving.com/file/15582303683.pdfIn PDF document text
- https://iva-vietnam.com/userfiles/file/rarifepuwegoluwexavitit.pdfIn PDF document text
- https://lexconsulting.ro/webroot/files/media/rixuxadulakis.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ec066f58b9d483401e5745a87a33d85d/wevesojajetuwovifuraruliv.pdfIn PDF document text
- https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/7861398752.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba448e9fce---wavokudutor.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d1807825bfccef0cd2861ea4d8d235a1/65237245942.pdfIn PDF document text
- http://stmrcstvm.com/userfiles/file/sufavuzi.pdfIn PDF document text
- https://www.tahitotfalu.hu/ckfinder/userfiles/files/35436060354.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/3oml4i6f6d7q48g507bv97pph8/75928269906.pdfIn PDF document text
- http://khautrangkhangviet.com/upload/img/files/1108520703.pdfIn PDF document text
- http://nextlab-semi.com/files/fckeditor/file/31072639583.pdfIn PDF document text
- https://iskoruma.com/upload/ckfinder/files/zejefokutawopovosuwixof.pdfIn PDF document text
- http://usmleworkout.com/files/file/bukunifeliverivo.pdfIn PDF document text
- https://priscar.com/documents/files/pifamamexegibuwat.pdfIn PDF document text
- http://ahjygjg.com/upload_fck/file/2021-9-13/20210913192246498664.pdfIn PDF document text
- http://uniskycn.com/userfiles/file/LianMeng202109251050449718.pdfIn PDF document text
- http://tonwen.org/userfiles/file/16112723300.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=dialogue+between+you+and+your+friendPDF link annotation
- http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/jexujudax.pdfIn 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_off00012ced.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CED	10804 bytes
SHA-256: `7243863dad85e41ce84d78ac00fb5b123fd4b61244175dd0ffb54ebc3b18b311`
`font_01_sfnt_off000145d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145D2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00015de4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15DE4	20976 bytes
SHA-256: `8ebbb1d9ec051415eff80e91c2c5b4c7cb624f0fc22104f7379130779f3c0362`

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