PDF malware analysis — malicious · aa3b49e5ae823144

MALICIOUS

PDF

84.6 KB Created: 2021-09-03 05:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 96543583b1d4604b9be7554676557902 SHA-1: dcd994fc46a38e523faa1c7450d0dcbfeacc4b0e SHA-256: aa3b49e5ae8231446123d9ac31845ec3da8cb10e4731c51f169d04ac620b5bd4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to redirect users to malicious content. The document's structure and embedded links indicate a phishing or malware distribution lure, likely using a spearphishing attachment as the initial access vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9834

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://almuhja.net/ckfinder/userfiles/files/wotabuxafuzunubevu.pdf In PDF document text
- https://dnsbp.com/all4help/fckuserfiles/file/ganibejuledekebug.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c91c7919f5---20692003253.pdfIn PDF document text
- http://ausafe.net/images/art/files/8087743298.pdfIn PDF document text
- https://hrmconsulting.biz/upload/files/legup.pdfIn PDF document text
- http://studiodabo.eu/userfiles/files/70289124050.pdfIn PDF document text
- http://3bbb.fr/ckeditor/upload/files/rivalituvewavonu.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1610057d14c13b---kelur.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607e90faa579b---79874702844.pdfIn PDF document text
- https://nepalipublisher.com/ckfinder/userfiles/files/tizonumuburogojabem.pdfIn PDF document text
- https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/67eb0126b08fe969454764ac8a8483d6/24793443115.pdfIn PDF document text
- https://alternatifhosting.com/calisma2/files/uploads/92335144371.pdfIn PDF document text
- http://archifolder.com/userfiles/files/jasikawexutumunoze.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/aba39713b190506000fc33dd85e8220d/fokuruwoduvesajor.pdfIn PDF document text
- https://ortechindustries.ca/ci/userfiles/files/dupodopofewixajuxakobet.pdfIn PDF document text
- https://mailing.crpm.ch/ck/ckfinder/userfiles/files/wemomorinavupuvokuxorup.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/e49cc85514c99a664ee360e35ccb345f/wokuvu.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4ee97b4c7---nijixulorarawedaxanuda.pdfIn PDF document text
- http://hpworld.hu/data/pic/Image/file/41829303372.pdfIn PDF document text
- https://hasekei.jp/userfiles/file/sivubidomoxijoda.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9145fc7f---32389280898.pdfIn PDF document text
- http://thedewakohchang.com/image/upload/File/4267417691.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee28f014cb---61300872371.pdfIn PDF document text
- http://kamienneogrody.com/userfiles/file/14065721212.pdfIn PDF document text
- https://angkoronetour.com/userfiles/file/8990201608.pdfIn PDF document text
- http://vieclamtaichinh68.com/upload/files/73551882277.pdfIn PDF document text
- https://hsiaoying.com/userfiles/file/xikudakitilababar.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=marco+conceptual+para+la+informaci%C3%B3n+financiera+2018+pdfPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e17d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE17D	18212 bytes
SHA-256: `71ac3c82a292a93cf79874b18798c9511c66332a0260b4e1f59961f0ce4a84fd`
`font_01_sfnt_off00010f37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F37	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001274e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1274E	11348 bytes
SHA-256: `e45754f329670c166ffad3df40d5b7df68e9f75f29b5db5665d51f42d757b6e3`

Open this report in the interactive analyzer, or submit your own file for analysis.