PDF malware analysis — malicious · 3808b8a76be900cc

MALICIOUS

PDF

91.4 KB Created: 2021-05-02 10:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 92d8d93aeb9560273a66745e04c8ed33 SHA-1: 9e0fe16efc51832e92a9282809665733038ed42c SHA-256: 3808b8a76be900cc821171c76a98188e270ebf417c0e57f839a1492b0e7be7f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics suggest the document functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The presence of numerous embedded URLs, many hosted on disposable domains or compromised CMS uploads, strongly supports a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9569

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7a61b8c2---tusebarepelobitapipawewis.pdf
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607201f05c5bf---xeroxitip.pdf
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608be73eebf7a---nolipazogemabofutum.pdf
- https://prana.video/wp-content/plugins/super-forms/uploads/php/files/nd7j6v3jk44qbjqtpd4vu5bjed/gavum.pdf
- https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c76e90426---44553677499.pdf
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867e012742b---99901700552.pdf
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086b73119b87---kexuji.pdf
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9095526b7---45095230214.pdf
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad6434f116---bojexejagepojixona.pdf
- https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad56cdbfe1---runedoxizezomijajujulab.pdf
- https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/40c30a35ef5813e7b3c6988b08b4f069/91899849775.pdf
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce235b19a5---73380923748.pdf
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607de23866dad---19616501079.pdf
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e16a00745e---bitabipofonusapezuz.pdf
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/7e4b59f032b76b9b21e125b36607ce34/81938461453.pdf
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078291398873---xejixitutoseluwajese.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.opentle.org
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=broadsheet+size+uk
- http://scripts.sil.org/OFL
- http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010737.bin` `aaae8f6a790c61d1f40fed9681cdc7752e35d29e1f7123da9a538014bc9d201d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10737	7072 bytes
`font_01_sfnt_off00011f40.bin` `c39112e8dd381d87f0587d2731f306582dc7b6197c1ea0f586670e4f508c03b5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F40	5044 bytes
`font_02_sfnt_off0001305a.bin` `5592e469f694938dd582311c620bcfbc77948193ff43fa25ac24e78d798856ef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1305A	6968 bytes
`font_03_sfnt_off000142fe.bin` `0dd5e9578630e9fbde27d3869ba4ca0cd57beb04aaeefb2b33bdfe72a699373c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142FE	13064 bytes

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