PDF malware analysis — malicious · 235bfc80e70d98e0

MALICIOUS

PDF

89.3 KB Created: 2021-06-30 18:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: f2dff8bc075b84871225444a77f317fc SHA-1: 955441d9aff517ec0a87b12d11d2e60f32653d69 SHA-256: 235bfc80e70d98e052c920e519efc98ea4485d223ab096f8521fbbe7c94615d7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external URIs and links to compromised CMS uploads and disposable hosting, indicating a link farm or SEO poisoning attack. ClamAV detection and ML classification confirm its malicious nature, likely serving as a lure to malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/wifepozubatod.pdf In PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6c22276254---xesej.pdfIn PDF document text
- https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160786a1d12680---wujapiro.pdfIn PDF document text
- https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/178438b2a82062d2beba0e1e1105452e/wujewobawezidon.pdfIn PDF document text
- https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/4c7817fb730d0e286ef27ee0f8d4222f/xarogegutazumunemelunewu.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9765772a4d---16402250730.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b391991d1---41491500378.pdfIn PDF document text
- http://sntaviator.ru/ckfinder/userfiles/files/kawep.pdfIn PDF document text
- https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/77384d1dcdc7bc48a0702dce25bba712/gapidasopafubovidejaw.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2c2c71668---tenozukowuzuses.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609830578dbcf---59521975696.pdfIn PDF document text
- http://myjobcareer.net/userfiles/file/2021062008341173499.pdfIn PDF document text
- http://euroinstytut.pl/galeria/file/93192957819.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/4eec8391261074b1875b6d1e98deb943/donewenitu.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/61gt3fl06rcn38dot2ou57u423/fuwul.pdfIn PDF document text
- http://anhuicrew.com/upload_fck/file/2021-5-4/20210504093200204008.pdfIn PDF document text
- https://vivekanandbawwa.com/userfiles/file/morefomebala.pdfIn PDF document text
- http://forter.vn/hinhanh/file/24000265680.pdfIn PDF document text
- https://argumentua.com/i/file/rosupokitexowujuxefu.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cce620cb514---75630049703.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd446740734---munobanajonewobo.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ee276a51fc288b85ce13c5395426d45f/74582139689.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b799ef39ba8---jezebebekuvigiletew.pdfIn PDF document text
- http://xedaptap.net/userfiles/file/rulol.pdfIn PDF document text
- http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98634503665.pdfIn PDF document text
- http://ansonseatery.com/uploads/files/tovijenuzekij.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/9end5tuobor63pdoueakek58ps/wisetutuk.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c045b544e90---visadipakowiwo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dfd+diagram+for+airline+reservation+system+level+1PDF 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_off0000f74a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF74A	10928 bytes
SHA-256: `081df44cafd171f5b20144500be4b2017e7a98505ffc5b0782a32ea16fa9f667`
`font_01_sfnt_off0001106c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1106C	18068 bytes
SHA-256: `0e2e75fbdd767acebdfd634c9913fe235300aa20903a1a07f72109b1ed8a76a5`
`font_02_sfnt_off00013f5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F5F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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