PDF malware analysis — malicious · be70023602b075d2

MALICIOUS

PDF

85.3 KB Created: 2021-09-06 06:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 4796bef4033a380183307e710dd9b3ef SHA-1: dbc10a82783c8202b8d15a410cc15df295b1d0b5 SHA-256: be70023602b075d2fe1b4bedd26f357b91694212d44fb997647f246af55229f2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. The file's structure and embedded links are consistent with a malicious PDF designed to lure users to external malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6aa18410f---70328960315.pdf In PDF document text
- http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210723064710.pdfIn PDF document text
- http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073aaa1301cf---80723645697.pdfIn PDF document text
- https://fablab808.com/nbloom/fckuploads/file/49358220428.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f36acd35c---kosoraxofeboxaxibu.pdfIn PDF document text
- http://learnersdigest.org/userfiles/file/sovuzewuruzuzowitaraku.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/o6s2lvl0t7j8cjh9hrqgcgouks/14762075861.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/88255944070.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9608ebc4c4382ee04c536a4e79fffa14/rarojuvolokunepazenirekix.pdfIn PDF document text
- http://gabident.pl/local/userfiles/file/16364574055.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/26fb7e8f2a80fd67ed68f0faedb83a10/wasemunuro.pdfIn PDF document text
- http://www.sport-konyv.hu/userfiles/file/kadegomito.pdfIn PDF document text
- http://biemmecommerciale.eu/userfiles/files/jodavukavezerokuxedubib.pdfIn PDF document text
- http://rlangkhan.com/upload/userfiles/files/nuxowesureferukoweleti.pdfIn PDF document text
- https://basisnomor.com/contents//files/49136842349.pdfIn PDF document text
- https://thefertilizergranulator.com/d/files/46862899135.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075441016757---lafiw.pdfIn PDF document text
- http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/jeresomizeduleg.pdfIn PDF document text
- https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/bda88d6d3b5d7cdd1a4c3af06d44186b/fugojuneporakupolewapaw.pdfIn PDF document text
- http://szymonadamczyk.pl/uploads/fck/file/54998822429.pdfIn PDF document text
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/cc4b91e8737630882d22b1df415d6cf0/joselenesekugujozetox.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc0ac83d428---sejatiluvelodazav.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5b7b44216---wutogaxekawafopofekatado.pdfIn PDF document text
- http://windmill-bv.com/userfiles/files/60093202576.pdfIn PDF document text
- https://dragonexpressml.com/userfiles/files/pegitiruxow.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607007363bbb3---91888474258.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=vector+format+eps+pdfPDF 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_off0000e85c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE85C	10508 bytes
SHA-256: `a8b032e5f4a54a69fb1ed679d6b7a93c5277f5e410f3b9f7e17c53a168fb0268`
`font_01_sfnt_off0001005b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1005B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001186d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1186D	18200 bytes
SHA-256: `41c53336a31762d519d0a02f222d4777cd97ca78f294d56109b1aaa82dd7fed3`

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