PDF malware analysis — malicious · 3870d744a5eb4538

MALICIOUS

PDF

90.7 KB Created: 2021-08-13 19:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 9d43edf5d0ac4846eaf90e65475acdb3 SHA-1: 7ebf2fcdd15169973b67cb52ba067316ca5ef318 SHA-256: 3870d744a5eb45385775e41735767dbf6fb2e357d039c3599fa4a7c6b20302a0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9906

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 http://zoncmswebsitebeheer.nl/files/editor/file/digirebekutinawiz.pdf In PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ca13b8e52e7---kulepuvi.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/2e6e3fde5f8a895a832f2544342aaea8/29041759593.pdfIn PDF document text
- http://alphasigmaoverseas.com/userfiles/file/45156324559.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6b709fcc3---34160859220.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fa5e38003361652c880e46cde18950cc/55601732503.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd179011e03---liratezewutaxesav.pdfIn PDF document text
- http://www.juniorcollege.cl/ckfinder/userfiles/files/73962666054.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ee4262639c8c9bf7aca367818e9f36eb/51048570490.pdfIn PDF document text
- http://qtjdb.com/UploadFile/2021/05/25/file/20210525_160626_182.pdfIn PDF document text
- https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160af0772493e4---nixuxefesebukuteji.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160825510426fb---dezipov.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/e5b7d4894c880e1c49311bbc13236f75/5862774080.pdfIn PDF document text
- http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160900c736a205---12279747201.pdfIn PDF document text
- https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/f2c59fcd3e40af31c9f92f0367a53e2e/6195966303.pdfIn PDF document text
- http://baldonimarcostudio.eu/userfiles/files/38167822370.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f612b9a8b1---bonuj.pdfIn PDF document text
- https://kompaspt1.com/contents//files/21826642609.pdfIn PDF document text
- http://damoorefamilyreunion.com/clients/7/71/71c8bb141a0941b69292984b9770a174/File/zodixigadupifeguvokadodi.pdfIn PDF document text
- http://bertrandetgastineaudesigners.com/userfiles/file/kewolomitefozofugo.pdfIn PDF document text
- http://royalrep.com/userfiles/files/6081093114.pdfIn PDF document text
- https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/94866349883.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e95735603---83656677588.pdfIn PDF document text
- http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/rexefib.pdfIn PDF document text
- http://piecco.eu/upload/files/22266728158.pdfIn PDF document text
- http://hanlacsclub.com/ckupload/files/daliluwoj.pdfIn PDF document text
- http://mesahighclassof63.com/clients/79820/File/rulivekenibepularojota.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=aile+i%C3%A7i+ileti%C5%9Fim+pptPDF 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_off0000fe6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE6A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011681.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11681	10180 bytes
SHA-256: `45bd471f887daa57a45de6767e4af29c0f13ccb01ced20d1475ca41a404941ae`
`font_02_sfnt_off00012d1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D1C	18876 bytes
SHA-256: `22ea8351c1f5b44f8d4826e04056516be601e23fcac74a5207503c374f02b2bd`

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