PDF malware analysis — malicious · 07dc49e815382ef1

MALICIOUS

PDF

84.2 KB Created: 2021-07-20 10:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2940e4baf157cae7d3958a6506953040 SHA-1: e3ccfd0eaf2779d8b250f2f1009f69a3a319f22f SHA-256: 07dc49e815382ef1cfbddfdac2643f4b0d214b9f7d1d266ea979e12b2523f299

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised WordPress installations or disposable domains. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics confirms this behavior. The primary attack pattern involves luring users to these sites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e92f100335c---betalu.pdf In PDF document text
- http://bigsvatcharasith.com/userfiles/file/ralevu.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d668d0e6d6f---kawenuwerajuwofibebunirif.pdfIn PDF document text
- https://bravo-hk.com/userfiles/file/soderugitusulerukinerabat.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/d13ec54477b25e5ca4af49f31418ad59/46584063136.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2ce6551630ea5da2f593701a880b86ce/3691631333.pdfIn PDF document text
- http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/semasuxubiwipubepapaf.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fcbf595afb8268775351b690f2f60ba7/25869579669.pdfIn PDF document text
- http://www.asap-recruitment.net/upload/file/sibugekevatupo.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/44ce1f8e30713f89c481d2d4ef584409/63541211378.pdfIn PDF document text
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/305ee4f869d42f7f5dbd62337ebbad6e/57269127472.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608740159da0e---befuluwejeribewa.pdfIn PDF document text
- https://nikosdimos.gr/userfiles/file/86240378237.pdfIn PDF document text
- https://gachbinhduong.com/upload/file/bosizogalujimonopixomazip.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d8794f73f20---xikowukajubaduwadodelego.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/guwelokojog.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdace0e2c7---fatefaxojisuxupemepi.pdfIn PDF document text
- http://malopolskiszlakwinny.pl/upload/File/96746149444.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834e5a892de---54691702174.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608414e94fc3c---20984761827.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbadd210a0---31443197959.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bb57537c0---7311964367.pdfIn PDF document text
- http://bachtungcompany.com/upload/files/77998100870.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e4584d74bb32c6f0b15b5c02ca0ddf10/31409735018.pdfIn PDF document text
- https://albawadiroad.com/userfiles/files/39920278206.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ride+a+horse+on+the+beachPDF 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_off0000e8ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8EF	16280 bytes
SHA-256: `e7b97df7d8124de697fe0d94473672868b9fcb6700fc246a475a63d4613509f1`
`font_01_sfnt_off00011313.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11313	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012b2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B2A	10604 bytes
SHA-256: `85729db9d3b4d830738248b796a8daf4f560f244099b4f48fbab5bafd175450e`

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