PDF malware analysis — malicious · bbe3d50a493a8cd6

MALICIOUS

PDF

95.6 KB Created: 2021-08-16 01:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0afd4d825afb20149a31bf81dc2b6ebb SHA-1: 5698419e6f1eac5e98c9cc93dbed0e02a7cc5181 SHA-256: bbe3d50a493a8cd6efb52e2f942b23f6072f2cefc2a5793b2b2e86138d148dfb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9726

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://synerhu.ru/uplcv?utm_term=el+pianista+pelicula+completa+espa%C3%B1ol PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a590a22b5fe---64494974824.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/rv5thtk2kcpfdjmcu4jmcp3635/69745269093.pdfIn PDF document text
- https://debcopharma.com/userfiles/file/28602930411.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/jupg1du1an8im6dbei5j7p2qg1/durot.pdfIn PDF document text
- http://toonesk.com/upload/bavozemimivet.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/95fcc05c002740157f9c6466bdc321e4/84242421207.pdfIn PDF document text
- http://highlevel.pl/userfiles/file/nekupajesode.pdfIn PDF document text
- http://berbun.com/user_img/file/gebawegofafa.pdfIn PDF document text
- http://sns.hu/_user/file/23003200507.pdfIn PDF document text
- http://hevolta.com/upload/file/wewuvifejisupijivur.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/loribe.pdfIn PDF document text
- http://tasarimak.com/ckfinder/userfiles/files/37977090622.pdfIn PDF document text
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f1854a294---wazisewofilajixoso.pdfIn PDF document text
- http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160842597902c5---58226686223.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/h6dlal6eln8ciktl276prutpe4/lokiwujobamibirova.pdfIn PDF document text
- http://briztravel.com/upload/files/riwabajaj.pdfIn PDF document text
- https://aitalk.vn/upload/files/woman.pdfIn PDF document text
- http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608052db2e408---37104964462.pdfIn PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/h8gh806drqvasvu99mcskn3icg/46728800194.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5b0bd2413---jetaka.pdfIn PDF document text
- https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092b106f0080---50885125463.pdfIn PDF document text
- http://www.aamuhsv-madisonalumni.org/files/files/53524457724.pdfIn PDF document text
- http://christschoolblr.in/userfiles/file/26643024316.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/85559219939.pdfIn PDF document text
- http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/23286389823.pdfIn PDF document text
- https://wagaskar.com/media/86116053405.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f4f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4F0	19184 bytes
SHA-256: `ccd94526c80c9eaef850321a614319dead79a1e4cc712b4100d1c9ce32a8e4bd`
`font_01_sfnt_off00012658.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12658	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013e6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E6F	10724 bytes
SHA-256: `3303920736596fef1bd21123a2e3a76d3f71ceaf14a673cc6b352795064d6fda`
`font_03_sfnt_off000156cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x156CB	16448 bytes
SHA-256: `f6e6ff50fe4098b7d3d1d6a41e14fab98f83484f7c50a74097a60c289dc7209e`

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