PDF malware analysis — malicious · e52f494000f56195

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 07:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5dad84e71d822bc19b75b50936907154 SHA-1: 829d5ba1a4ca9291887c155514c7978ccb294ad5 SHA-256: e52f494000f561951bc8df72460243128999ff77a377161d4fe7ca122130b060

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these link farms and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://automsystem.com/UploadFile/file/20210511042929979.pdf In PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/aa1929524b90c3a855ef0f1286b46f4a/boxoximijemozu.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/19s91jui5m469msr7430ronvv7/82974582271.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/xagige.pdfIn PDF document text
- http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160786d2a6f364---92969216399.pdfIn PDF document text
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0f3e45f4---vuvuzimimesamizonapofim.pdfIn PDF document text
- http://master-sign.ru/ckfinder/userfiles/files/juwos.pdfIn PDF document text
- http://3dsami.org/uploadfilefiles/37472734316.pdfIn PDF document text
- https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/kucjvqtr6mnivrrl0jmn44almb/kuzesugelozumiwefo.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c8a82dbe---ginagisumagebuvemoferowi.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444983fc65---nilalanil.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/50925741303.pdfIn PDF document text
- http://aiaato.com/FileData/ckfinder/files/20210824_16F199C3A335E142.pdfIn PDF document text
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c50e349662---36089143745.pdfIn PDF document text
- https://bestcoloringpages.com/userfiles/file/21569494965.pdfIn PDF document text
- http://lnyuanzong.com/uploads/files/20210725115850.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/5fd190f48b8666b4ed4a8b64916990ee/94225232254.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9ab4bbf88ec72aeac61d63f3a772e90c/32807654433.pdfIn PDF document text
- http://innersolutions-uk.com/file/vulevapibogoravu.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cdce87bab---vaped.pdfIn PDF document text
- http://canadianartistic.com/userfiles/file/39978232161.pdfIn PDF document text
- http://fine-trading-knotwork.com/uploads/media/lenusojirotedovinixuti.pdfIn PDF document text
- https://stomatoloska-ordinacija-rijeka.com/files/77933582322.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c9ef6646d288190802f1b096b6222ba5/borakarogatodeteluraw.pdfIn PDF document text
- http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/eh7u357sqph8232in7pg1ro0u4/tixadedudafisuje.pdfIn PDF document text
- https://mpksieradz.pl/upload/file/raridomedulodipevof.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=philips+multigroom+7000+manualPDF 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_off0000dadc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDADC	17000 bytes
SHA-256: `b36849adc7db4c646e2a595a378051fb1e26425139458683a7e608b2a91cf8ee`
`font_01_sfnt_off0001063d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1063D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011e54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E54	10840 bytes
SHA-256: `760a20b45de214d3aca5247af479b7f77104db84c72714e153446cd84760076b`

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