PDF malware analysis — malicious · 3692fe18aaeb8694

MALICIOUS

PDF

71.8 KB Created: 2021-09-04 13:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: e899a9703f51d05869694b47cd17d267 SHA-1: a2d3dd4ab852b42cc34fb92da8e467540ac0c29d SHA-256: 3692fe18aaeb8694d0a8b5e2c3ca03e748f89c619466e3aafc1af7bf985c34bb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, pointing to numerous compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the heuristics strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9909

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://pistant.ru/uplcv?utm_term=epa+solid+waste+disposal+facility+criteria+technical+manual PDF link annotation
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608b913ea3630---48283925016.pdfIn PDF document text
- http://songhakbbq.com/uploads/files/veduper.pdfIn PDF document text
- http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608e20172d956---tapezuvilobegakogef.pdfIn PDF document text
- http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/48307451625.pdfIn PDF document text
- https://stiff.pl/ckfinder/userfiles/files/zekivesekab.pdfIn PDF document text
- https://mgc.to/sites/web/upload/files/bebipofuzagapimetul.pdfIn PDF document text
- https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/g4gvcqpb71be38cropafle7jrb/39805689757.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/713896fe66b295da07d00971e92e6b86/44625035213.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ced707437b---10076318852.pdfIn PDF document text
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/dcfma46tjnn9pr6u9eb6b3fbs2/fimubu.pdfIn PDF document text
- https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16089e57a3dffb---bidetozif.pdfIn PDF document text
- https://tomas-music.com/contents//files/sokaduximafururulo.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/eb26e4280b6d043152e4a7b4426bb121/tibufosuxovofuwojala.pdfIn PDF document text
- https://dpengineers.info/admin/userfiles/file/69417142441.pdfIn PDF document text
- http://execdentalclinic.com/uploads/ckfinder/userfiles/files/46656357095.pdfIn PDF document text
- http://matkinhantai.com/luutru/files/doxukuravowom.pdfIn PDF document text
- http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/c2ab8acd5d4bb899141820d8261b4501/difilobetuseb.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/vv7i9nk1qo4ol35gpelmq7u10b/mirupowuwabad.pdfIn PDF document text
- http://orthodoxvaidikasanghom.org/userfiles/file/58698152770.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ag7fm95sk3jvlo0qucf918bd5j/rogebupe.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf35ad5eef---13821373301.pdfIn PDF document text
- https://eatorhours.org/e-bussiness/fckimages/file/38586767475.pdfIn PDF document text
- http://nhs-carpediem.com/clients/46367/File/42807092141.pdfIn PDF document text
- http://banquat.com/userfiles/files/kogulavonidon.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabb3e6853d---23245057074.pdfIn PDF document text
- https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/a182ef01cfd460763abffa0984162b46/sajoxevero.pdfIn PDF document text
- http://a-xian-coat.com/uploads/files/202108211516105458.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ba5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA5E	14492 bytes
SHA-256: `384d54b7154ec2df51c341b5354c82e5c60efaddfd546f2ce042ba260f4e42b2`
`font_01_sfnt_off0000de93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE93	11168 bytes
SHA-256: `be32bace447f9e0db73012a52ac23a55d8b0aff67935021a84bb16a3c9a61cf7`
`font_02_sfnt_off0000f892.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF892	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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