PDF malware analysis — malicious · d67caafefed772f9

MALICIOUS

PDF

79.7 KB Created: 2021-09-22 22:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: a491f68b8ffb2ce7edafccee6ce09249 SHA-1: 25ea531f6a2a8e1a4d47a46b2a005f6a298626a6 SHA-256: d67caafefed772f928623c4c08a1dd08bbac89ddf1872ce105085ebf3fd2d3ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links pointing to various domains, many of which appear to be compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://allytemp.ru/uplcv?utm_term=how+to+root+tablet+without+pc PDF link annotation
- http://fapannimario.it/userfiles/files/65119283191.pdfIn PDF document text
- http://ebbers-schilderwerken.nl/uploads/files/rebokawezitugufar.pdfIn PDF document text
- http://quatangsongvan.com/hinhanh_fckeditor/file/31226343073.pdfIn PDF document text
- http://indcms.testingmachines.com/images/file/13335721384.pdfIn PDF document text
- https://niboparis.com/upload/fckeditor/files/mododupetovukodofodobuk.pdfIn PDF document text
- https://luckysurface.itweald.com/uploads/files/613e4600c762f.pdfIn PDF document text
- https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/95895667152.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149101845df8---3205149385.pdfIn PDF document text
- http://badaranquehablar.com/userfiles/files/68024125996.pdfIn PDF document text
- http://www.lnk-creation.fr/upload/file/potadotukinabozenufitose.pdfIn PDF document text
- http://cka-shiba.com/ckfinder/userfiles/files/fevunekabaxog.pdfIn PDF document text
- https://allcreaturesinc.com/files/files/62905459090.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142392c41971---dawulatokekelezizafamo.pdfIn PDF document text
- http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/bujefe.pdfIn PDF document text
- https://jecoexports.com/ckfinder/userfiles/files/birunizew.pdfIn PDF document text
- https://turismo-galicia.es/ckfinder/userfiles/files/4782533983.pdfIn PDF document text
- http://atreve.eu/ubezpiecz/obrazy/file/duruxapozajamobujabebibin.pdfIn PDF document text
- http://tmkb.org.tr/ckfinder/userfiles/files/waxomixokakugota.pdfIn PDF document text
- https://bibonatura.hu/ckfinder/userfiles/files/22870634552.pdfIn PDF document text
- https://ipekyolumedya.com/resim_galeri/file/89185625609.pdfIn PDF document text
- http://rideco.hu/upload/file/wimaladorolowu.pdfIn PDF document text
- https://echipamente-scule.ro/userfiles/file/kunirawawivupegafawu.pdfIn PDF document text
- https://thepainter.asia/upload/files/50774261294.pdfIn PDF document text
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148b1a33a46e---13786751496.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d62c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD62C	16744 bytes
SHA-256: `e3fbe0c4a9be5bdd3a5d4c1ae8cbb318a05f2764d84d78405b479dd51526e160`
`font_01_sfnt_off0001017f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1017F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011996.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11996	10516 bytes
SHA-256: `d3751759c8c557493d2715dea77f3c7d6a0a193dfee12e7e50dbf24551cddfc9`

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