PDF malware analysis — malicious · fe123b2f89a669d9

MALICIOUS

PDF

75.4 KB Created: 2021-01-17 14:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 1ad46f5d406170a4f1f9e1fc348bdc6b SHA-1: 966619c1fb904e6989ec655592c3a1115c10f002 SHA-256: fe123b2f89a669d9cfdf90fe3dc4090bc0f3446552d458d4268a72c0b124cd1d

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1027 Obfuscated Files or Information T1553.005 Security Software Tampering

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to potentially malicious websites. The document also contains instructions to disable security software, increasing the risk to the user. The presence of numerous external links, many hosted on disposable domains, strongly suggests a phishing or SEO manipulation scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Security software disable instruction high SE_SECURITY_BYPASS

Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
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://trafficel.ru/aws?utm_term=adobe+lightroom+6+free++softonic PDF link annotation
- https://cdn.sqhk.co/moviferu/11BghVE/nfl_schedule_week_11_predictions.pdfIn PDF document text
- https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
- https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/fumunumivufudizit.pdfIn PDF document text
- https://sakirirolero.weebly.com/uploads/1/3/1/3/131383462/kamew.pdfIn PDF document text
- https://namokokesovu.weebly.com/uploads/1/3/4/4/134480524/cf929586edc.pdfIn PDF document text
- https://cdn.sqhk.co/rapowipijes/jjfWheb/19803451246.pdfIn PDF document text
- https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/xomis_gozori_lokodefujeben.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387040/normal_5fde241a0bc84.pdfIn PDF document text
- https://cdn.sqhk.co/potiribuwuf/ihdihxo/fobawusokureb.pdfIn PDF document text
- https://ladujeka.weebly.com/uploads/1/3/0/9/130969399/9b3e6b4bda9c1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427528/normal_5fa625e97d64b.pdfIn PDF document text
- https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/4a133c889.pdfIn PDF document text
- https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/2844741.pdfIn PDF document text
- https://cdn.sqhk.co/gisusisabez/Zichgv3/tijarusesasuximo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366395/normal_5f877760b8ba7.pdfIn PDF document text
- https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/1ce13f.pdfIn PDF document text
- https://tejikapor.weebly.com/uploads/1/3/1/3/131382395/pidejagani.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375896/normal_5f8c3c96811a5.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/tevigotu/dininitasuduso.pdfIn PDF document text
- https://s3.amazonaws.com/nuruvapozixix/candy_metadata_online.pdfIn PDF document text
- https://s3.amazonaws.com/bupijila/ghost_recon_breakpoint_map.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eae8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAE8	5508 bytes
SHA-256: `ccb2afe54545ef95c7593ab6414ed0c6442aaa1e019f91d9b4c8bcf67917161c`
`font_01_sfnt_off0000fd81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD81	10216 bytes
SHA-256: `eb53e278af9de791c0b81cd12d51075c1e771ad33f844164f241570648cf31c9`

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