PDF malware analysis — malicious · 13151b58488973e4

MALICIOUS

PDF

86.1 KB Created: 2021-08-15 02:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 7af92230d98d75ebdbc0497f192e69a0 SHA-1: 1cc6ec00d309de376e3ac2255ab3f90fc69b42d5 SHA-256: 13151b58488973e4bdc6ecbc3d7c6fe51b3d81ae0f0c75ddcf6e77745ae605ba

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://pixomot.ru/uplcv?utm_term=how+to+set+up+smok+x+priv+kit PDF link annotation
- https://spiuruguay.com/ckfinder/userfiles/files/wiwaxakosud.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15ca318d36---konubijijunonam.pdfIn PDF document text
- http://tcsm62.org/uploads/news/file/javugisekopoli.pdfIn PDF document text
- https://mednet.mk/public_html/upload/userfiles/file/4713790897.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785162bafea---vatilipekokagajanava.pdfIn PDF document text
- https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3a336453073adb0caf6ff05c9243df10/86729482682.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b4eb66f29---46887863816.pdfIn PDF document text
- https://phuketwebstudio.com/ckfinder/userfiles/files/62970915802.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160876ff640f80---3338047447.pdfIn PDF document text
- https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3e2b1bd9a6a3bfd1ecaaa0d6ed1ed713/wemijofowelepibabije.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/30493806134.pdfIn PDF document text
- https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/qm0mro9vd1u3jupdojofq1kblj/manupusanawa.pdfIn PDF document text
- https://familienarbeit3plus.ch/userfiles/files/kaganipufokizut.pdfIn PDF document text
- http://sanruou.com/app/webroot/uploads/files/nirebozufus.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085304341663---97054486777.pdfIn PDF document text
- https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075d18ee07b8---64596331244.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/kmj9renjfcehjphin1en862lc5/53632350860.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3198223ea7---4093376698.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/7518c7c941293e5d73aaf15e22a7cbf1/6532063352.pdfIn PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fe0c57303---72341919678.pdfIn PDF document text
- http://ecandrychow.pl/Image/files/53382815646.pdfIn PDF document text
- http://grandwatergatehotel.com/upfile_hotel/files/fegukebafirolawojaka.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/9pq5gi9qad3vvf4qdmrsb0jqk1/38084303103.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e151.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE151	1676 bytes
SHA-256: `7a5613d4a6f4e405b2035e5a9a12226afb8290a571abbd10372e79c6281f3093`
`font_01_sfnt_off0000e94c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE94C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010163.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10163	10540 bytes
SHA-256: `e99f11285a73a173501b43d931609ac2624f734c775fdf74e571177a2eb37fa6`
`font_03_sfnt_off0001197a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1197A	17996 bytes
SHA-256: `4537ddf302d0933726d9ef201948e773c9b6f9dc484a3336eedfe42ce19b02c9`

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