PDF malware analysis — malicious · 9006c7d40b38ae5c

MALICIOUS

PDF

79.3 KB Created: 2020-12-25 01:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: d1df517eb4b3e81e8564063c5e21c476 SHA-1: 92534b949ef6e31fc813d1686b3df4720a66c3ec SHA-256: 9006c7d40b38ae5cbafa60dd130b6223e47ed56adf70892ecdbc2b9704a3592e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, indicating it is part of a link farm designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/aws?utm_term=bengali+calendar++2017 PDF link annotation
- https://sobepaded.weebly.com/uploads/1/3/4/3/134305425/3095906.pdfIn PDF document text
- https://cdn.sqhk.co/zikegasenar/ihjCgfr/ios_screen_recorder_download_apk.pdfIn PDF document text
- https://cdn.sqhk.co/wepaxuwelusu/jcjdgce/59628470136.pdfIn PDF document text
- https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/9062829.pdfIn PDF document text
- https://cdn.sqhk.co/netesatova/C6yieT8/75621106001.pdfIn PDF document text
- https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/vuxetenavupa.pdfIn PDF document text
- https://cdn.sqhk.co/masamiwe/YjhjHNI/87438255237.pdfIn PDF document text
- https://zilowefid.weebly.com/uploads/1/3/4/5/134510497/7e726c9b1.pdfIn PDF document text
- https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/mawojisebawoxonebu.pdfIn PDF document text
- https://www.calendarcraft.com/wp-content/uploads/2019/09/omnew.pngIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/6350ed6b-6872-40b6-9db1-ca2d53b41092/harry_potter_audiobook_torrent.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fe1a8841-5d54-4742-9667-2718c6b7aae7/wujabo.pdfIn PDF document text
- https://s3.amazonaws.com/fenatagazise/carta_de_apresentao_da_empresa.pdfIn PDF document text
- https://s3.amazonaws.com/muwomapotumugi/pancreas_anatomia_e_histologia.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://scripts.sil.org/OFLIn PDF document text
- http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cad0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAD0	5384 bytes
SHA-256: `190b72710acbcd8e05175db0618e7c8707b3a854296eae802689323350b522c4`
`font_01_sfnt_off0000dd34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD34	7372 bytes
SHA-256: `e5142e315d0e3d0ae2d7e84dc23a4bbeca06e497b340528ccecb50067ee972fc`
`font_02_sfnt_off0000f54e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF54E	11148 bytes
SHA-256: `56fc606d36640577caf0609d9e0e5192f6c5aa170dc5636b34f0b97a5617aae1`
`font_03_sfnt_off00011933.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11933	16164 bytes
SHA-256: `c1ba3419a5370763aa1b75259a63cd33ed14e5a3d70cd71e8a04aec8eddd74b8`

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