PDF malware analysis — malicious · 6bcee154188bfb8c

MALICIOUS

PDF

79.7 KB Created: 2021-01-25 04:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 5b6a6c20a40cf85266e93278a1838e8d SHA-1: 9077d4c1b5f4b9c456cdb0ca8e1d95a7e52ebf0e SHA-256: 6bcee154188bfb8c961c3d1d99796d0df3788143fff36adc12acf470d652dea2

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a wide array of external URLs, potentially for SEO manipulation or to host further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://traffine.ru/123?utm_term=weslo+momentum+730+elliptical+manual PDF link annotation
- https://gejilesiwurulu.weebly.com/uploads/1/3/4/3/134374779/tomom_viviluwigesokun_turarane.pdfIn PDF document text
- http://zenarajare.22web.org/12106690890.pdfIn PDF document text
- http://negeduji.66ghz.com/brahma_vishnu_maheshwara_picture.pdfIn PDF document text
- https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/movol.pdfIn PDF document text
- https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/paxafavapusa.pdfIn PDF document text
- https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/favogoki.pdfIn PDF document text
- https://zisafidavilux.weebly.com/uploads/1/3/2/8/132814196/kefirib_wumofoporu_masewuwusox.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4494893/normal_5fcf42b27feac.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451225/normal_5fc7c3d8199aa.pdfIn PDF document text
- https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/87a3b9da.pdfIn PDF document text
- https://mawakigimewu.weebly.com/uploads/1/3/4/8/134875352/fatakazu.pdfIn PDF document text
- http://rusedewafizurap.66ghz.com/16411914760.pdfIn PDF document text
- https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/f59e3cf643040.pdfIn PDF document text
- https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/womod_lifitipodorajed_tisopodu_tiduga.pdfIn PDF document text
- http://noxivivixuza.22web.org/aggiornamento_android_pie_lg_g7.pdfIn PDF document text
- https://tebeneka.weebly.com/uploads/1/3/0/8/130874559/begoboxob.pdfIn PDF document text
- http://biduwupukipajov.22web.org/danielson_framework_lesson_plan_template_editable.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://dojeranorered.epizy.com/87655496666.pdfIn PDF document text
- http://lowadof.epizy.com/free_ip_address_changer_apk.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
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0001081a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1081A	23304 bytes
SHA-256: `9434895300616d9f08acb8f86d39b2aa23305fd6f3f5bff5f0669adb87ae73a9`
`font_00_sfnt_off0000d0e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0E5	5380 bytes
SHA-256: `746cf67d384f401d2ad3313d5dafc6ab88669b7996f7a85cfcf7fbe6f1d853ea`
`font_01_sfnt_off0000e32f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE32F	10788 bytes
SHA-256: `972b51b54fc14a030cfa6b63f8b8501662c5de64d39ef40479e603d3c78991e0`

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